feat: add Observatory health monitoring & alerting for running services

Implements Bezalel Epic-003 — a lightweight monitoring script that:

- Checks gateway and API server process liveness
- Monitors disk, memory, and CPU thresholds (warn/critical levels)
- Probes webhook and API server HTTP endpoints for responsiveness
- Verifies SQLite database connectivity and size
- Sends Telegram alerts when checks degrade or recover (within 60s)
- Posts daily digest reports summarising 24h health, SLO status, error counts
- Persists 30 days of health snapshots in SQLite (~/.hermes/observatory.db)
- Tracks alerts_sent for trend analysis
- Defines and tracks SLOs: gateway uptime ≥99.5%, webhook p95 latency ≤2s

Usage:
  python observatory.py --check        # one-shot check
  python observatory.py --daemon       # continuous 60s poll
  python observatory.py --digest       # print daily digest
  python observatory.py --send-digest  # send digest via Telegram
  python observatory.py --slo          # print SLO report
  python observatory.py --history 20   # show last 20 records

Config via env: OBSERVATORY_ALERT_CHAT_ID, TELEGRAM_BOT_TOKEN, etc.
Adds psutil optional dependency group in pyproject.toml.
45 unit tests covering checks, persistence, alerting, digest, SLOs, and CLI.

Fixes #147

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/CODEOWNERS

@@ -0,0 +1,13 @@
+# Default owners for all files
+* @Timmy
+
+# Critical paths require explicit review
+/gateway/ @Timmy
+/tools/ @Timmy
+/agent/ @Timmy
+/config/ @Timmy
+/scripts/ @Timmy
+/.github/workflows/ @Timmy
+/pyproject.toml @Timmy
+/requirements.txt @Timmy
+/Dockerfile @Timmy

.github/ISSUE_TEMPLATE/security_pr_checklist.yml

@@ -0,0 +1,99 @@
+name: "🔒 Security PR Checklist"
+description: "Use this when your PR touches authentication, file I/O, external API calls, or other sensitive paths."
+title: "[Security Review]: "
+labels: ["security", "needs-review"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ## Security Pre-Merge Review
+        Complete this checklist before requesting review on PRs that touch **authentication, file I/O, external API calls, or secrets handling**.
+
+  - type: input
+    id: pr-link
+    attributes:
+      label: Pull Request
+      description: Link to the PR being reviewed
+      placeholder: "https://forge.alexanderwhitestone.com/Timmy_Foundation/hermes-agent/pulls/XXX"
+    validations:
+      required: true
+
+  - type: dropdown
+    id: change-type
+    attributes:
+      label: Change Category
+      description: What kind of sensitive change does this PR make?
+      multiple: true
+      options:
+        - Authentication / Authorization
+        - File I/O (read/write/delete)
+        - External API calls (outbound HTTP/network)
+        - Secret / credential handling
+        - Command execution (subprocess/shell)
+        - Dependency addition or update
+        - Configuration changes
+        - CI/CD pipeline changes
+    validations:
+      required: true
+
+  - type: checkboxes
+    id: secrets-checklist
+    attributes:
+      label: Secrets & Credentials
+      options:
+        - label: No secrets, API keys, or credentials are hardcoded
+          required: true
+        - label: All sensitive values are loaded from environment variables or a secrets manager
+          required: true
+        - label: Test fixtures use fake/placeholder values, not real credentials
+          required: true
+
+  - type: checkboxes
+    id: input-validation-checklist
+    attributes:
+      label: Input Validation
+      options:
+        - label: All external input (user, API, file) is validated before use
+          required: true
+        - label: File paths are validated against path traversal (`../`, null bytes, absolute paths)
+        - label: URLs are validated for SSRF (blocked private/metadata IPs)
+        - label: Shell commands do not use `shell=True` with user-controlled input
+
+  - type: checkboxes
+    id: auth-checklist
+    attributes:
+      label: Authentication & Authorization (if applicable)
+      options:
+        - label: Authentication tokens are not logged or exposed in error messages
+        - label: Authorization checks happen server-side, not just client-side
+        - label: Session tokens are properly scoped and have expiry
+
+  - type: checkboxes
+    id: supply-chain-checklist
+    attributes:
+      label: Supply Chain
+      options:
+        - label: New dependencies are pinned to a specific version range
+        - label: Dependencies come from trusted sources (PyPI, npm, official repos)
+        - label: No `.pth` files or install hooks that execute arbitrary code
+        - label: "`pip-audit` passes (no known CVEs in added dependencies)"
+
+  - type: textarea
+    id: threat-model
+    attributes:
+      label: Threat Model Notes
+      description: |
+        Briefly describe the attack surface this change introduces or modifies, and how it is mitigated.
+      placeholder: |
+        This PR adds a new outbound HTTP call to the OpenRouter API.
+        Mitigation: URL is hardcoded (no user input), response is parsed with strict schema validation.
+
+  - type: textarea
+    id: testing
+    attributes:
+      label: Security Testing Done
+      description: What security testing did you perform?
+      placeholder: |
+        - Ran validate_security.py — all checks pass
+        - Tested path traversal attempts manually
+        - Verified no secrets in git diff

.github/workflows/dependency-audit.yml

@@ -0,0 +1,82 @@
+name: Dependency Audit
+
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - 'requirements.txt'
+      - 'pyproject.toml'
+      - 'uv.lock'
+  schedule:
+    - cron: '0 8 * * 1'  # Weekly on Monday
+  workflow_dispatch:
+
+permissions:
+  pull-requests: write
+  contents: read
+
+jobs:
+  audit:
+    name: Audit Python dependencies
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v5
+      - name: Set up Python
+        run: uv python install 3.11
+      - name: Install pip-audit
+        run: uv pip install --system pip-audit
+      - name: Run pip-audit
+        id: audit
+        run: |
+          set -euo pipefail
+          # Run pip-audit against the lock file/requirements
+          if pip-audit --requirement requirements.txt -f json -o /tmp/audit-results.json 2>/tmp/audit-stderr.txt; then
+            echo "found=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "found=true" >> "$GITHUB_OUTPUT"
+            # Check severity
+            CRITICAL=$(python3 -c "
+          import json, sys
+          data = json.load(open('/tmp/audit-results.json'))
+          vulns = data.get('dependencies', [])
+          for d in vulns:
+              for v in d.get('vulns', []):
+                  aliases = v.get('aliases', [])
+                  # Check for critical/high CVSS
+                  if any('CVSS' in str(a) for a in aliases):
+                      print('true')
+                      sys.exit(0)
+          print('false')
+          " 2>/dev/null || echo 'false')
+            echo "critical=${CRITICAL}" >> "$GITHUB_OUTPUT"
+          fi
+        continue-on-error: true
+      - name: Post results comment
+        if: steps.audit.outputs.found == 'true' && github.event_name == 'pull_request'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          BODY="## ⚠️ Dependency Vulnerabilities Detected
+
+          \`pip-audit\` found vulnerable dependencies in this PR. Review and update before merging.
+
+          \`\`\`
+          $(cat /tmp/audit-results.json | python3 -c "
+          import json, sys
+          data = json.load(sys.stdin)
+          for dep in data.get('dependencies', []):
+              for v in dep.get('vulns', []):
+                  print(f\"  {dep['name']}=={dep['version']}: {v['id']} - {v.get('description', '')[:120]}\")
+          " 2>/dev/null || cat /tmp/audit-stderr.txt)
+          \`\`\`
+
+          ---
+          *Automated scan by [dependency-audit](/.github/workflows/dependency-audit.yml)*"
+          gh pr comment "${{ github.event.pull_request.number }}" --body "$BODY"
+      - name: Fail on vulnerabilities
+        if: steps.audit.outputs.found == 'true'
+        run: |
+          echo "::error::Vulnerable dependencies detected. See PR comment for details."
+          cat /tmp/audit-results.json | python3 -m json.tool || true
+          exit 1

.github/workflows/quarterly-security-audit.yml

@@ -0,0 +1,114 @@
+name: Quarterly Security Audit
+
+on:
+  schedule:
+    # Run at 08:00 UTC on the first day of each quarter (Jan, Apr, Jul, Oct)
+    - cron: '0 8 1 1,4,7,10 *'
+  workflow_dispatch:
+    inputs:
+      reason:
+        description: 'Reason for manual trigger'
+        required: false
+        default: 'Manual quarterly audit'
+
+permissions:
+  issues: write
+  contents: read
+
+jobs:
+  create-audit-issue:
+    name: Create quarterly security audit issue
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Get quarter info
+        id: quarter
+        run: |
+          MONTH=$(date +%-m)
+          YEAR=$(date +%Y)
+          QUARTER=$(( (MONTH - 1) / 3 + 1 ))
+          echo "quarter=Q${QUARTER}-${YEAR}" >> "$GITHUB_OUTPUT"
+          echo "year=${YEAR}" >> "$GITHUB_OUTPUT"
+          echo "q=${QUARTER}" >> "$GITHUB_OUTPUT"
+
+      - name: Create audit issue
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          QUARTER="${{ steps.quarter.outputs.quarter }}"
+
+          gh issue create \
+            --title "[$QUARTER] Quarterly Security Audit" \
+            --label "security,audit" \
+            --body "$(cat <<'BODY'
+          ## Quarterly Security Audit — ${{ steps.quarter.outputs.quarter }}
+
+          This is the scheduled quarterly security audit for the hermes-agent project. Complete each section and close this issue when the audit is done.
+
+          **Audit Period:** ${{ steps.quarter.outputs.quarter }}
+          **Due:** End of quarter
+          **Owner:** Assign to a maintainer
+
+          ---
+
+          ## 1. Open Issues & PRs Audit
+
+          Review all open issues and PRs for security-relevant content. Tag any that touch attack surfaces with the `security` label.
+
+          - [ ] Review open issues older than 30 days for unaddressed security concerns
+          - [ ] Tag security-relevant open PRs with `needs-security-review`
+          - [ ] Check for any issues referencing CVEs or known vulnerabilities
+          - [ ] Review recently closed security issues — are fixes deployed?
+
+          ## 2. Dependency Audit
+
+          - [ ] Run `pip-audit` against current `requirements.txt` / `pyproject.toml`
+          - [ ] Check `uv.lock` for any pinned versions with known CVEs
+          - [ ] Review any `git+` dependencies for recent changes or compromise signals
+          - [ ] Update vulnerable dependencies and open PRs for each
+
+          ## 3. Critical Path Review
+
+          Review recent changes to attack-surface paths:
+
+          - [ ] `gateway/` — authentication, message routing, platform adapters
+          - [ ] `tools/` — file I/O, command execution, web access
+          - [ ] `agent/` — prompt handling, context management
+          - [ ] `config/` — secrets loading, configuration parsing
+          - [ ] `.github/workflows/` — CI/CD integrity
+
+          Run: `git log --since="3 months ago" --name-only -- gateway/ tools/ agent/ config/ .github/workflows/`
+
+          ## 4. Secret Scan
+
+          - [ ] Run secret scanner on the full codebase (not just diffs)
+          - [ ] Verify no credentials are present in git history
+          - [ ] Confirm all API keys/tokens in use are rotated on a regular schedule
+
+          ## 5. Access & Permissions Review
+
+          - [ ] Review who has write access to the main branch
+          - [ ] Confirm branch protection rules are still in place (require PR + review)
+          - [ ] Verify CI/CD secrets are scoped correctly (not over-permissioned)
+          - [ ] Review CODEOWNERS file for accuracy
+
+          ## 6. Vulnerability Triage
+
+          List any new vulnerabilities found this quarter:
+
+          | ID | Component | Severity | Status | Owner |
+          |----|-----------|----------|--------|-------|
+          | | | | | |
+
+          ## 7. Action Items
+
+          | Action | Owner | Due Date | Status |
+          |--------|-------|----------|--------|
+          | | | | |
+
+          ---
+
+          *Auto-generated by [quarterly-security-audit](/.github/workflows/quarterly-security-audit.yml). Close this issue when the audit is complete.*
+          BODY
+          )"

.github/workflows/secret-scan.yml

@@ -0,0 +1,136 @@
+name: Secret Scan
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: read
+
+jobs:
+  scan:
+    name: Scan for secrets
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Fetch base branch
+        run: git fetch origin ${{ github.base_ref }}
+
+      - name: Scan diff for secrets
+        id: scan
+        run: |
+          set -euo pipefail
+
+          # Get only added lines from the diff (exclude deletions and context lines)
+          DIFF=$(git diff "origin/${{ github.base_ref }}"...HEAD -- \
+            ':!*.lock' ':!uv.lock' ':!package-lock.json' ':!yarn.lock' \
+            | grep '^+' | grep -v '^+++' || true)
+
+          FINDINGS=""
+          CRITICAL=false
+
+          check() {
+            local label="$1"
+            local pattern="$2"
+            local critical="${3:-false}"
+            local matches
+            matches=$(echo "$DIFF" | grep -oP "$pattern" || true)
+            if [ -n "$matches" ]; then
+              FINDINGS="${FINDINGS}\n- **${label}**: pattern matched"
+              if [ "$critical" = "true" ]; then
+                CRITICAL=true
+              fi
+            fi
+          }
+
+          # AWS keys — critical
+          check "AWS Access Key" 'AKIA[0-9A-Z]{16}' true
+
+          # Private key headers — critical
+          check "Private Key Header" '-----BEGIN (RSA|EC|DSA|OPENSSH|PGP) PRIVATE KEY' true
+
+          # OpenAI / Anthropic style keys
+          check "OpenAI-style API key (sk-)" 'sk-[a-zA-Z0-9]{20,}' false
+
+          # GitHub tokens
+          check "GitHub personal access token (ghp_)" 'ghp_[a-zA-Z0-9]{36}' true
+          check "GitHub fine-grained PAT (github_pat_)" 'github_pat_[a-zA-Z0-9_]{1,}' true
+
+          # Slack tokens
+          check "Slack bot token (xoxb-)" 'xoxb-[0-9A-Za-z\-]{10,}' true
+          check "Slack user token (xoxp-)" 'xoxp-[0-9A-Za-z\-]{10,}' true
+
+          # Generic assignment patterns — exclude obvious placeholders
+          GENERIC=$(echo "$DIFF" | grep -iP '(api_key|apikey|api-key|secret_key|access_token|auth_token)\s*[=:]\s*['"'"'"][^'"'"'"]{20,}['"'"'"]' \
+            | grep -ivP '(fake|mock|test|placeholder|example|dummy|your[_-]|xxx|<|>|\{\{)' || true)
+          if [ -n "$GENERIC" ]; then
+            FINDINGS="${FINDINGS}\n- **Generic credential assignment**: possible hardcoded secret"
+          fi
+
+          # .env additions with long values
+          ENV_DIFF=$(git diff "origin/${{ github.base_ref }}"...HEAD -- '*.env' '**/.env' '.env*' \
+            | grep '^+' | grep -v '^+++' || true)
+          ENV_MATCHES=$(echo "$ENV_DIFF" | grep -P '^[A-Z_]+=.{16,}' \
+            | grep -ivP '(fake|mock|test|placeholder|example|dummy|your[_-]|xxx)' || true)
+          if [ -n "$ENV_MATCHES" ]; then
+            FINDINGS="${FINDINGS}\n- **.env file**: lines with potentially real secret values detected"
+          fi
+
+          # Write outputs
+          if [ -n "$FINDINGS" ]; then
+            echo "found=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "found=false" >> "$GITHUB_OUTPUT"
+          fi
+
+          if [ "$CRITICAL" = "true" ]; then
+            echo "critical=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "critical=false" >> "$GITHUB_OUTPUT"
+          fi
+
+          # Store findings in a file to use in comment step
+          printf "%b" "$FINDINGS" > /tmp/secret-findings.txt
+
+      - name: Post PR comment with findings
+        if: steps.scan.outputs.found == 'true' && github.event_name == 'pull_request'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          FINDINGS=$(cat /tmp/secret-findings.txt)
+          SEVERITY="warning"
+          if [ "${{ steps.scan.outputs.critical }}" = "true" ]; then
+            SEVERITY="CRITICAL"
+          fi
+
+          BODY="## Secret Scan — ${SEVERITY} findings
+
+          The automated secret scanner detected potential secrets in the diff for this PR.
+
+          ### Findings
+          ${FINDINGS}
+
+          ### What to do
+          1. Remove any real credentials from the diff immediately.
+          2. If the match is a false positive (test fixture, placeholder), add a comment explaining why or rename the variable to include \`fake\`, \`mock\`, or \`test\`.
+          3. Rotate any exposed credentials regardless of whether this PR is merged.
+
+          ---
+          *Automated scan by [secret-scan](/.github/workflows/secret-scan.yml)*"
+
+          gh pr comment "${{ github.event.pull_request.number }}" --body "$BODY"
+
+      - name: Fail on critical secrets
+        if: steps.scan.outputs.critical == 'true'
+        run: |
+          echo "::error::Critical secrets detected in diff (private keys, AWS keys, or GitHub tokens). Remove them before merging."
+          exit 1
+
+      - name: Warn on non-critical findings
+        if: steps.scan.outputs.found == 'true' && steps.scan.outputs.critical == 'false'
+        run: |
+          echo "::warning::Potential secrets detected in diff. Review the PR comment for details."

.pre-commit-config.yaml

@@ -0,0 +1,25 @@
+repos:
+  # Secret detection
+  - repo: https://github.com/gitleaks/gitleaks
+    rev: v8.21.2
+    hooks:
+      - id: gitleaks
+        name: Detect secrets with gitleaks
+        description: Detect hardcoded secrets, API keys, and credentials
+
+  # Basic security hygiene
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v5.0.0
+    hooks:
+      - id: check-added-large-files
+        args: ['--maxkb=500']
+      - id: detect-private-key
+        name: Detect private keys
+      - id: check-merge-conflict
+      - id: check-yaml
+      - id: check-toml
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+        args: ['--markdown-linebreak-ext=md']
+      - id: no-commit-to-branch
+        args: ['--branch', 'main']

observatory.py

@@ -0,0 +1,955 @@
+"""
+Observatory — Testbed Health Monitoring & Alerting for Hermes Agent
+
+Checks running services, system resources, and connectivity.
+Fires Telegram alerts when thresholds are breached.
+Posts daily digest reports.
+Stores 30 days of historical health data in SQLite.
+
+Usage:
+    python observatory.py --check          # one-shot health check (stdout)
+    python observatory.py --daemon         # continuous monitor (60s poll)
+    python observatory.py --digest         # print / send daily digest
+    python observatory.py --history N      # show last N health records
+    python observatory.py --slo            # print SLO report
+
+Configuration (env vars, falls back to ~/.hermes/.env):
+    OBSERVATORY_ALERT_CHAT_ID   Telegram chat ID for alerts
+    OBSERVATORY_DIGEST_CHAT_ID  Telegram chat ID for daily digest (default: alert chat)
+    OBSERVATORY_POLL_INTERVAL   Seconds between health polls (default: 60)
+    OBSERVATORY_DB_PATH         SQLite path (default: ~/.hermes/observatory.db)
+    TELEGRAM_BOT_TOKEN          Bot token used to send alerts
+
+    # Threshold overrides (all optional):
+    OBSERVATORY_DISK_WARN_PCT   Disk usage warn threshold (default: 80)
+    OBSERVATORY_DISK_CRIT_PCT   Disk usage critical threshold (default: 90)
+    OBSERVATORY_MEM_WARN_PCT    Memory usage warn threshold (default: 80)
+    OBSERVATORY_MEM_CRIT_PCT    Memory usage critical threshold (default: 90)
+    OBSERVATORY_CPU_WARN_PCT    CPU usage warn threshold (default: 80)
+    OBSERVATORY_CPU_CRIT_PCT    CPU usage critical threshold (default: 95)
+    OBSERVATORY_WEBHOOK_URL     Webhook endpoint to probe (default: http://127.0.0.1:8080/health)
+    OBSERVATORY_API_URL         API server health URL (default: http://127.0.0.1:8642/health)
+    OBSERVATORY_WEBHOOK_LATENCY_SLO_MS   Webhook latency SLO ms (default: 2000)
+    OBSERVATORY_GATEWAY_UPTIME_SLO_PCT   Gateway uptime SLO % (default: 99.5)
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import logging
+import os
+import signal
+import sqlite3
+import sys
+import time
+import urllib.request
+import urllib.error
+from contextlib import contextmanager
+from dataclasses import dataclass, field, asdict
+from datetime import datetime, timezone, timedelta
+from pathlib import Path
+from typing import Any, Dict, List, Optional, Tuple
+
+# ---------------------------------------------------------------------------
+# Optional imports
+# ---------------------------------------------------------------------------
+try:
+    import psutil
+    _PSUTIL = True
+except ImportError:
+    _PSUTIL = False
+
+try:
+    from dotenv import load_dotenv as _load_dotenv
+    _DOTENV = True
+except ImportError:
+    _DOTENV = False
+
+logger = logging.getLogger("observatory")
+
+# ---------------------------------------------------------------------------
+# Constants & SLO definitions
+# ---------------------------------------------------------------------------
+
+RETENTION_DAYS = 30
+
+SLO_DEFINITIONS = {
+    "gateway_uptime_pct": {
+        "description": "Gateway process uptime over the last 24 hours",
+        "target": 99.5,
+        "unit": "%",
+    },
+    "webhook_latency_ms": {
+        "description": "Webhook endpoint p95 response latency",
+        "target": 2000,
+        "unit": "ms",
+        "direction": "lower_is_better",
+    },
+    "api_server_latency_ms": {
+        "description": "API server /health p95 response latency",
+        "target": 2000,
+        "unit": "ms",
+        "direction": "lower_is_better",
+    },
+}
+
+# ---------------------------------------------------------------------------
+# Configuration
+# ---------------------------------------------------------------------------
+
+def _load_env() -> None:
+    """Load .env from HERMES_HOME if dotenv is available."""
+    if not _DOTENV:
+        return
+    hermes_home = Path(os.getenv("HERMES_HOME", Path.home() / ".hermes"))
+    env_path = hermes_home / ".env"
+    if env_path.exists():
+        _load_dotenv(env_path, override=False)
+    # Project-level .env as dev fallback
+    project_env = Path(__file__).parent / ".env"
+    if project_env.exists():
+        _load_dotenv(project_env, override=False)
+
+
+@dataclass
+class ObservatoryConfig:
+    alert_chat_id: Optional[str] = None
+    digest_chat_id: Optional[str] = None
+    telegram_token: Optional[str] = None
+    poll_interval: int = 60
+    db_path: Path = field(default_factory=lambda: Path(os.getenv("HERMES_HOME", Path.home() / ".hermes")) / "observatory.db")
+    disk_warn_pct: float = 80.0
+    disk_crit_pct: float = 90.0
+    mem_warn_pct: float = 80.0
+    mem_crit_pct: float = 90.0
+    cpu_warn_pct: float = 80.0
+    cpu_crit_pct: float = 95.0
+    webhook_url: str = "http://127.0.0.1:8080/health"
+    api_url: str = "http://127.0.0.1:8642/health"
+    webhook_latency_slo_ms: float = 2000.0
+    gateway_uptime_slo_pct: float = 99.5
+
+    @classmethod
+    def from_env(cls) -> "ObservatoryConfig":
+        _load_env()
+        cfg = cls()
+        cfg.telegram_token = os.getenv("TELEGRAM_BOT_TOKEN")
+        cfg.alert_chat_id = os.getenv("OBSERVATORY_ALERT_CHAT_ID")
+        cfg.digest_chat_id = os.getenv("OBSERVATORY_DIGEST_CHAT_ID") or cfg.alert_chat_id
+        cfg.poll_interval = int(os.getenv("OBSERVATORY_POLL_INTERVAL", 60))
+        db_override = os.getenv("OBSERVATORY_DB_PATH")
+        if db_override:
+            cfg.db_path = Path(db_override)
+        cfg.disk_warn_pct = float(os.getenv("OBSERVATORY_DISK_WARN_PCT", 80))
+        cfg.disk_crit_pct = float(os.getenv("OBSERVATORY_DISK_CRIT_PCT", 90))
+        cfg.mem_warn_pct = float(os.getenv("OBSERVATORY_MEM_WARN_PCT", 80))
+        cfg.mem_crit_pct = float(os.getenv("OBSERVATORY_MEM_CRIT_PCT", 90))
+        cfg.cpu_warn_pct = float(os.getenv("OBSERVATORY_CPU_WARN_PCT", 80))
+        cfg.cpu_crit_pct = float(os.getenv("OBSERVATORY_CPU_CRIT_PCT", 95))
+        cfg.webhook_url = os.getenv("OBSERVATORY_WEBHOOK_URL", "http://127.0.0.1:8080/health")
+        cfg.api_url = os.getenv("OBSERVATORY_API_URL", "http://127.0.0.1:8642/health")
+        cfg.webhook_latency_slo_ms = float(os.getenv("OBSERVATORY_WEBHOOK_LATENCY_SLO_MS", 2000))
+        cfg.gateway_uptime_slo_pct = float(os.getenv("OBSERVATORY_GATEWAY_UPTIME_SLO_PCT", 99.5))
+        return cfg
+
+
+# ---------------------------------------------------------------------------
+# Health check models
+# ---------------------------------------------------------------------------
+
+@dataclass
+class CheckResult:
+    name: str
+    status: str  # "ok" | "warn" | "critical" | "error"
+    message: str
+    value: Optional[float] = None
+    unit: Optional[str] = None
+    extra: Dict[str, Any] = field(default_factory=dict)
+
+
+@dataclass
+class HealthSnapshot:
+    ts: str  # ISO8601 UTC
+    checks: List[CheckResult] = field(default_factory=list)
+
+    @property
+    def overall_status(self) -> str:
+        statuses = {c.status for c in self.checks}
+        if "critical" in statuses or "error" in statuses:
+            return "critical"
+        if "warn" in statuses:
+            return "warn"
+        return "ok"
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "ts": self.ts,
+            "overall": self.overall_status,
+            "checks": [asdict(c) for c in self.checks],
+        }
+
+
+# ---------------------------------------------------------------------------
+# Individual health checks
+# ---------------------------------------------------------------------------
+
+def check_gateway_liveness() -> CheckResult:
+    """Check whether the Hermes gateway process is running."""
+    try:
+        from gateway.status import is_gateway_running, get_running_pid
+        running = is_gateway_running()
+        pid = get_running_pid()
+        if running:
+            return CheckResult(
+                name="gateway_process",
+                status="ok",
+                message=f"Gateway running (pid={pid})",
+                value=float(pid) if pid else None,
+            )
+        return CheckResult(
+            name="gateway_process",
+            status="critical",
+            message="Gateway process is NOT running",
+        )
+    except Exception as exc:
+        return CheckResult(
+            name="gateway_process",
+            status="error",
+            message=f"Could not determine gateway status: {exc}",
+        )
+
+
+def check_api_server_http(cfg: ObservatoryConfig) -> CheckResult:
+    """Check API server /health endpoint responsiveness."""
+    url = cfg.api_url
+    start = time.monotonic()
+    try:
+        req = urllib.request.Request(url, method="GET")
+        req.add_header("User-Agent", "hermes-observatory/1.0")
+        with urllib.request.urlopen(req, timeout=10) as resp:
+            latency_ms = (time.monotonic() - start) * 1000
+            body = resp.read(512).decode("utf-8", errors="replace")
+            status_code = resp.status
+        if status_code < 400:
+            slo_ok = latency_ms <= cfg.webhook_latency_slo_ms
+            return CheckResult(
+                name="api_server_http",
+                status="ok" if slo_ok else "warn",
+                message=f"API server OK ({latency_ms:.0f}ms){'' if slo_ok else ' — exceeds latency SLO'}",
+                value=latency_ms,
+                unit="ms",
+                extra={"status_code": status_code, "body_preview": body[:100]},
+            )
+        return CheckResult(
+            name="api_server_http",
+            status="critical",
+            message=f"API server returned HTTP {status_code}",
+            value=latency_ms,
+            unit="ms",
+        )
+    except urllib.error.URLError as exc:
+        latency_ms = (time.monotonic() - start) * 1000
+        # Not running is acceptable if gateway is not configured for API
+        reason = str(exc.reason) if hasattr(exc, "reason") else str(exc)
+        if "Connection refused" in reason or "Connection reset" in reason:
+            return CheckResult(
+                name="api_server_http",
+                status="warn",
+                message=f"API server not reachable at {url} (not started?)",
+                value=latency_ms,
+                unit="ms",
+            )
+        return CheckResult(
+            name="api_server_http",
+            status="error",
+            message=f"API server probe error: {exc}",
+            value=latency_ms,
+            unit="ms",
+        )
+    except Exception as exc:
+        latency_ms = (time.monotonic() - start) * 1000
+        return CheckResult(
+            name="api_server_http",
+            status="error",
+            message=f"API server probe exception: {exc}",
+            value=latency_ms,
+            unit="ms",
+        )
+
+
+def check_webhook_http(cfg: ObservatoryConfig) -> CheckResult:
+    """Check webhook endpoint responsiveness."""
+    url = cfg.webhook_url
+    start = time.monotonic()
+    try:
+        req = urllib.request.Request(url, method="GET")
+        req.add_header("User-Agent", "hermes-observatory/1.0")
+        with urllib.request.urlopen(req, timeout=10) as resp:
+            latency_ms = (time.monotonic() - start) * 1000
+            status_code = resp.status
+        slo_ok = latency_ms <= cfg.webhook_latency_slo_ms
+        if status_code < 400:
+            return CheckResult(
+                name="webhook_http",
+                status="ok" if slo_ok else "warn",
+                message=f"Webhook OK ({latency_ms:.0f}ms){'' if slo_ok else ' — exceeds latency SLO'}",
+                value=latency_ms,
+                unit="ms",
+                extra={"status_code": status_code},
+            )
+        return CheckResult(
+            name="webhook_http",
+            status="critical",
+            message=f"Webhook returned HTTP {status_code}",
+            value=latency_ms,
+            unit="ms",
+        )
+    except urllib.error.URLError as exc:
+        latency_ms = (time.monotonic() - start) * 1000
+        reason = str(exc.reason) if hasattr(exc, "reason") else str(exc)
+        if "Connection refused" in reason or "Connection reset" in reason:
+            return CheckResult(
+                name="webhook_http",
+                status="warn",
+                message=f"Webhook not reachable at {url} (not started?)",
+                value=latency_ms,
+                unit="ms",
+            )
+        return CheckResult(
+            name="webhook_http",
+            status="error",
+            message=f"Webhook probe error: {exc}",
+            value=latency_ms,
+            unit="ms",
+        )
+    except Exception as exc:
+        latency_ms = (time.monotonic() - start) * 1000
+        return CheckResult(
+            name="webhook_http",
+            status="error",
+            message=f"Webhook probe exception: {exc}",
+            value=latency_ms,
+            unit="ms",
+        )
+
+
+def check_disk(cfg: ObservatoryConfig) -> CheckResult:
+    """Check disk usage on the HERMES_HOME filesystem."""
+    if not _PSUTIL:
+        return CheckResult(name="disk", status="error", message="psutil not installed")
+    try:
+        hermes_home = Path(os.getenv("HERMES_HOME", Path.home() / ".hermes"))
+        path = str(hermes_home) if hermes_home.exists() else "/"
+        usage = psutil.disk_usage(path)
+        pct = usage.percent
+        free_gb = usage.free / (1024 ** 3)
+        if pct >= cfg.disk_crit_pct:
+            status = "critical"
+        elif pct >= cfg.disk_warn_pct:
+            status = "warn"
+        else:
+            status = "ok"
+        return CheckResult(
+            name="disk",
+            status=status,
+            message=f"Disk {pct:.1f}% used ({free_gb:.1f}GB free)",
+            value=pct,
+            unit="%",
+            extra={"free_bytes": usage.free, "total_bytes": usage.total},
+        )
+    except Exception as exc:
+        return CheckResult(name="disk", status="error", message=f"Disk check error: {exc}")
+
+
+def check_memory(cfg: ObservatoryConfig) -> CheckResult:
+    """Check system memory usage."""
+    if not _PSUTIL:
+        return CheckResult(name="memory", status="error", message="psutil not installed")
+    try:
+        mem = psutil.virtual_memory()
+        pct = mem.percent
+        available_gb = mem.available / (1024 ** 3)
+        if pct >= cfg.mem_crit_pct:
+            status = "critical"
+        elif pct >= cfg.mem_warn_pct:
+            status = "warn"
+        else:
+            status = "ok"
+        return CheckResult(
+            name="memory",
+            status=status,
+            message=f"Memory {pct:.1f}% used ({available_gb:.1f}GB available)",
+            value=pct,
+            unit="%",
+            extra={"available_bytes": mem.available, "total_bytes": mem.total},
+        )
+    except Exception as exc:
+        return CheckResult(name="memory", status="error", message=f"Memory check error: {exc}")
+
+
+def check_cpu(cfg: ObservatoryConfig) -> CheckResult:
+    """Check CPU usage (1-second sample)."""
+    if not _PSUTIL:
+        return CheckResult(name="cpu", status="error", message="psutil not installed")
+    try:
+        pct = psutil.cpu_percent(interval=1)
+        if pct >= cfg.cpu_crit_pct:
+            status = "critical"
+        elif pct >= cfg.cpu_warn_pct:
+            status = "warn"
+        else:
+            status = "ok"
+        return CheckResult(
+            name="cpu",
+            status=status,
+            message=f"CPU {pct:.1f}%",
+            value=pct,
+            unit="%",
+        )
+    except Exception as exc:
+        return CheckResult(name="cpu", status="error", message=f"CPU check error: {exc}")
+
+
+def check_database(cfg: ObservatoryConfig) -> CheckResult:
+    """Check observatory SQLite DB connectivity and size."""
+    db_path = cfg.db_path
+    try:
+        if not db_path.exists():
+            return CheckResult(
+                name="database",
+                status="warn",
+                message=f"Observatory DB not yet created at {db_path}",
+            )
+        size_kb = db_path.stat().st_size / 1024
+        conn = sqlite3.connect(str(db_path), timeout=5)
+        conn.execute("SELECT count(*) FROM health_snapshots").fetchone()
+        conn.close()
+        return CheckResult(
+            name="database",
+            status="ok",
+            message=f"Observatory DB OK ({size_kb:.1f}KB)",
+            value=size_kb,
+            unit="KB",
+            extra={"path": str(db_path)},
+        )
+    except Exception as exc:
+        return CheckResult(
+            name="database",
+            status="error",
+            message=f"DB check error: {exc}",
+        )
+
+
+def check_response_store_db() -> CheckResult:
+    """Check the API server's SQLite response store DB if it exists."""
+    try:
+        hermes_home = Path(os.getenv("HERMES_HOME", Path.home() / ".hermes"))
+        db_path = hermes_home / "response_store.db"
+        if not db_path.exists():
+            return CheckResult(
+                name="response_store_db",
+                status="ok",
+                message="Response store DB not present (API server not yet used)",
+            )
+        size_kb = db_path.stat().st_size / 1024
+        conn = sqlite3.connect(str(db_path), timeout=5)
+        count = conn.execute("SELECT count(*) FROM responses").fetchone()[0]
+        conn.close()
+        return CheckResult(
+            name="response_store_db",
+            status="ok",
+            message=f"Response store DB OK ({count} responses, {size_kb:.1f}KB)",
+            value=size_kb,
+            unit="KB",
+        )
+    except Exception as exc:
+        return CheckResult(
+            name="response_store_db",
+            status="error",
+            message=f"Response store DB error: {exc}",
+        )
+
+
+# ---------------------------------------------------------------------------
+# Snapshot collector
+# ---------------------------------------------------------------------------
+
+def collect_snapshot(cfg: ObservatoryConfig) -> HealthSnapshot:
+    """Run all checks and return a HealthSnapshot."""
+    ts = datetime.now(timezone.utc).isoformat()
+    checks = [
+        check_gateway_liveness(),
+        check_api_server_http(cfg),
+        check_webhook_http(cfg),
+        check_disk(cfg),
+        check_memory(cfg),
+        check_cpu(cfg),
+        check_database(cfg),
+        check_response_store_db(),
+    ]
+    return HealthSnapshot(ts=ts, checks=checks)
+
+
+# ---------------------------------------------------------------------------
+# SQLite persistence
+# ---------------------------------------------------------------------------
+
+@contextmanager
+def _db(path: Path):
+    path.parent.mkdir(parents=True, exist_ok=True)
+    conn = sqlite3.connect(str(path), timeout=10)
+    conn.execute("PRAGMA journal_mode=WAL")
+    conn.execute("PRAGMA foreign_keys=ON")
+    try:
+        yield conn
+        conn.commit()
+    finally:
+        conn.close()
+
+
+def _init_db(path: Path) -> None:
+    """Create tables if they don't exist."""
+    with _db(path) as conn:
+        conn.execute("""
+            CREATE TABLE IF NOT EXISTS health_snapshots (
+                id          INTEGER PRIMARY KEY AUTOINCREMENT,
+                ts          TEXT NOT NULL,
+                overall     TEXT NOT NULL,
+                payload     TEXT NOT NULL
+            )
+        """)
+        conn.execute("CREATE INDEX IF NOT EXISTS idx_snapshots_ts ON health_snapshots(ts)")
+        conn.execute("""
+            CREATE TABLE IF NOT EXISTS alerts_sent (
+                id          INTEGER PRIMARY KEY AUTOINCREMENT,
+                ts          TEXT NOT NULL,
+                check_name  TEXT NOT NULL,
+                status      TEXT NOT NULL,
+                message     TEXT NOT NULL
+            )
+        """)
+        conn.execute("CREATE INDEX IF NOT EXISTS idx_alerts_ts ON alerts_sent(ts)")
+
+
+def store_snapshot(cfg: ObservatoryConfig, snapshot: HealthSnapshot) -> None:
+    """Persist snapshot to SQLite."""
+    _init_db(cfg.db_path)
+    payload = json.dumps(snapshot.to_dict())
+    with _db(cfg.db_path) as conn:
+        conn.execute(
+            "INSERT INTO health_snapshots (ts, overall, payload) VALUES (?, ?, ?)",
+            (snapshot.ts, snapshot.overall_status, payload),
+        )
+        # Prune records older than RETENTION_DAYS
+        cutoff = (datetime.now(timezone.utc) - timedelta(days=RETENTION_DAYS)).isoformat()
+        conn.execute("DELETE FROM health_snapshots WHERE ts < ?", (cutoff,))
+
+
+def record_alert_sent(cfg: ObservatoryConfig, check_name: str, status: str, message: str) -> None:
+    """Record that an alert was dispatched."""
+    _init_db(cfg.db_path)
+    with _db(cfg.db_path) as conn:
+        conn.execute(
+            "INSERT INTO alerts_sent (ts, check_name, status, message) VALUES (?, ?, ?, ?)",
+            (datetime.now(timezone.utc).isoformat(), check_name, status, message),
+        )
+
+
+def load_snapshots(cfg: ObservatoryConfig, days: int = RETENTION_DAYS) -> List[Dict[str, Any]]:
+    """Load snapshots from the last N days."""
+    if not cfg.db_path.exists():
+        return []
+    cutoff = (datetime.now(timezone.utc) - timedelta(days=days)).isoformat()
+    with _db(cfg.db_path) as conn:
+        rows = conn.execute(
+            "SELECT ts, overall, payload FROM health_snapshots WHERE ts >= ? ORDER BY ts DESC",
+            (cutoff,),
+        ).fetchall()
+    return [json.loads(row[2]) for row in rows]
+
+
+# ---------------------------------------------------------------------------
+# Alerting
+# ---------------------------------------------------------------------------
+
+def _telegram_send(token: str, chat_id: str, text: str) -> bool:
+    """Send a Telegram message via the Bot API. Returns True on success."""
+    url = f"https://api.telegram.org/bot{token}/sendMessage"
+    payload = json.dumps({
+        "chat_id": chat_id,
+        "text": text,
+        "parse_mode": "HTML",
+        "disable_web_page_preview": True,
+    }).encode("utf-8")
+    req = urllib.request.Request(url, data=payload, method="POST")
+    req.add_header("Content-Type", "application/json")
+    req.add_header("User-Agent", "hermes-observatory/1.0")
+    try:
+        with urllib.request.urlopen(req, timeout=15) as resp:
+            body = json.loads(resp.read())
+            return bool(body.get("ok"))
+    except Exception as exc:
+        logger.warning("Telegram send failed: %s", exc)
+        return False
+
+
+def _status_emoji(status: str) -> str:
+    return {"ok": "✅", "warn": "⚠️", "critical": "🔴", "error": "❌"}.get(status, "❓")
+
+
+def maybe_alert(cfg: ObservatoryConfig, snapshot: HealthSnapshot, prev_snapshot: Optional[HealthSnapshot]) -> List[str]:
+    """
+    Fire Telegram alerts for newly degraded checks.
+    Returns list of alert messages sent.
+    """
+    if not cfg.telegram_token or not cfg.alert_chat_id:
+        return []
+
+    alerts_sent = []
+    prev_statuses: Dict[str, str] = {}
+    if prev_snapshot:
+        for c in prev_snapshot.checks:
+            prev_statuses[c.name] = c.status
+
+    for check in snapshot.checks:
+        if check.status in ("critical", "error"):
+            prev = prev_statuses.get(check.name, "ok")
+            if prev not in ("critical", "error"):
+                # Newly degraded — alert
+                emoji = _status_emoji(check.status)
+                msg = (
+                    f"{emoji} <b>Hermes Observatory Alert</b>\n\n"
+                    f"<b>Check:</b> {check.name}\n"
+                    f"<b>Status:</b> {check.status.upper()}\n"
+                    f"<b>Message:</b> {check.message}\n"
+                    f"<b>Time:</b> {snapshot.ts}"
+                )
+                if _telegram_send(cfg.telegram_token, cfg.alert_chat_id, msg):
+                    alerts_sent.append(msg)
+                    record_alert_sent(cfg, check.name, check.status, check.message)
+                    logger.info("Alert sent for %s (%s)", check.name, check.status)
+        elif check.status == "ok":
+            prev = prev_statuses.get(check.name)
+            if prev in ("critical", "error"):
+                # Recovery alert
+                msg = (
+                    f"✅ <b>Hermes Observatory — Recovery</b>\n\n"
+                    f"<b>Check:</b> {check.name} has recovered\n"
+                    f"<b>Message:</b> {check.message}\n"
+                    f"<b>Time:</b> {snapshot.ts}"
+                )
+                if _telegram_send(cfg.telegram_token, cfg.alert_chat_id, msg):
+                    alerts_sent.append(msg)
+                    record_alert_sent(cfg, check.name, "recovery", check.message)
+
+    return alerts_sent
+
+
+# ---------------------------------------------------------------------------
+# Daily digest
+# ---------------------------------------------------------------------------
+
+def build_digest(cfg: ObservatoryConfig) -> str:
+    """Build a daily health digest from stored snapshots."""
+    snapshots = load_snapshots(cfg, days=1)
+    total = len(snapshots)
+    if total == 0:
+        return "No health data available for the last 24 hours."
+
+    # Count by overall status
+    status_counts: Dict[str, int] = {"ok": 0, "warn": 0, "critical": 0, "error": 0}
+    check_degraded_counts: Dict[str, int] = {}
+    latencies: Dict[str, List[float]] = {}
+
+    for snap in snapshots:
+        overall = snap.get("overall", "ok")
+        status_counts[overall] = status_counts.get(overall, 0) + 1
+        for check in snap.get("checks", []):
+            name = check["name"]
+            status = check["status"]
+            if status in ("critical", "error", "warn"):
+                check_degraded_counts[name] = check_degraded_counts.get(name, 0) + 1
+            value = check.get("value")
+            unit = check.get("unit")
+            if value is not None and unit == "ms":
+                if name not in latencies:
+                    latencies[name] = []
+                latencies[name].append(float(value))
+
+    uptime_pct = 100.0 * status_counts["ok"] / total if total else 0.0
+    now = datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M UTC")
+
+    lines = [
+        f"📊 <b>Hermes Observatory — Daily Digest</b>",
+        f"<b>Generated:</b> {now}",
+        f"",
+        f"<b>Last 24h Summary</b> ({total} samples)",
+        f"  Healthy:  {status_counts['ok']} ({100*status_counts['ok']//total if total else 0}%)",
+        f"  Warning:  {status_counts.get('warn', 0)}",
+        f"  Critical: {status_counts.get('critical', 0)}",
+        f"  Error:    {status_counts.get('error', 0)}",
+        f"",
+    ]
+
+    # SLO status
+    lines.append("<b>SLO Status</b>")
+    gw_uptime_target = cfg.gateway_uptime_slo_pct
+    gw_snapshots = [
+        s for s in snapshots
+        if any(c["name"] == "gateway_process" and c["status"] == "ok" for c in s.get("checks", []))
+    ]
+    gw_uptime = 100.0 * len(gw_snapshots) / total if total else 0.0
+    gw_ok = gw_uptime >= gw_uptime_target
+    lines.append(
+        f"  {'✅' if gw_ok else '❌'} Gateway uptime: {gw_uptime:.1f}% (target: ≥{gw_uptime_target}%)"
+    )
+
+    wh_latency_target = cfg.webhook_latency_slo_ms
+    if "webhook_http" in latencies and latencies["webhook_http"]:
+        wh_vals = sorted(latencies["webhook_http"])
+        p95_idx = int(len(wh_vals) * 0.95)
+        p95 = wh_vals[min(p95_idx, len(wh_vals) - 1)]
+        wh_ok = p95 <= wh_latency_target
+        lines.append(
+            f"  {'✅' if wh_ok else '❌'} Webhook p95 latency: {p95:.0f}ms (target: ≤{wh_latency_target:.0f}ms)"
+        )
+    else:
+        lines.append(f"  ⚫ Webhook latency: no data")
+
+    if "api_server_http" in latencies and latencies["api_server_http"]:
+        api_vals = sorted(latencies["api_server_http"])
+        p95_idx = int(len(api_vals) * 0.95)
+        p95 = api_vals[min(p95_idx, len(api_vals) - 1)]
+        api_ok = p95 <= wh_latency_target
+        lines.append(
+            f"  {'✅' if api_ok else '❌'} API server p95 latency: {p95:.0f}ms (target: ≤{wh_latency_target:.0f}ms)"
+        )
+
+    # Top degraded checks
+    if check_degraded_counts:
+        lines.append("")
+        lines.append("<b>Degraded Checks (24h)</b>")
+        for name, count in sorted(check_degraded_counts.items(), key=lambda x: -x[1]):
+            pct = 100 * count // total if total else 0
+            lines.append(f"  • {name}: {count} incidents ({pct}%)")
+
+    lines.append("")
+    lines.append(f"<i>Observatory DB: {cfg.db_path}</i>")
+
+    return "\n".join(lines)
+
+
+def send_digest(cfg: ObservatoryConfig) -> bool:
+    """Build and send the daily digest to Telegram. Returns True on success."""
+    digest = build_digest(cfg)
+    if cfg.telegram_token and cfg.digest_chat_id:
+        return _telegram_send(cfg.telegram_token, cfg.digest_chat_id, digest)
+    return False
+
+
+# ---------------------------------------------------------------------------
+# Display helpers
+# ---------------------------------------------------------------------------
+
+_STATUS_COLORS = {
+    "ok": "\033[32m",       # green
+    "warn": "\033[33m",     # yellow
+    "critical": "\033[31m", # red
+    "error": "\033[91m",    # bright red
+}
+_RESET = "\033[0m"
+
+
+def _color_status(status: str) -> str:
+    c = _STATUS_COLORS.get(status, "")
+    return f"{c}{status.upper()}{_RESET}"
+
+
+def print_snapshot(snapshot: HealthSnapshot) -> None:
+    overall_color = _STATUS_COLORS.get(snapshot.overall_status, "")
+    print(f"\n{'='*60}")
+    print(f"  Hermes Observatory — {snapshot.ts}")
+    print(f"  Overall: {overall_color}{snapshot.overall_status.upper()}{_RESET}")
+    print(f"{'='*60}")
+    for check in snapshot.checks:
+        emoji = _status_emoji(check.status)
+        val_str = f" [{check.value:.1f}{check.unit}]" if check.value is not None and check.unit else ""
+        print(f"  {emoji} {check.name:<25} {_color_status(check.status):<15} {check.message}{val_str}")
+    print()
+
+
+def print_slo_report(cfg: ObservatoryConfig) -> None:
+    """Print current SLO definitions and targets."""
+    snapshots = load_snapshots(cfg, days=30)
+    total = len(snapshots)
+    print(f"\n{'='*60}")
+    print("  Hermes Observatory — SLO Report (last 30 days)")
+    print(f"{'='*60}")
+    for slo_key, slo in SLO_DEFINITIONS.items():
+        print(f"\n  {slo['description']}")
+        print(f"    Target: {slo['target']}{slo['unit']}")
+        if total == 0:
+            print(f"    Status: no data")
+            continue
+        if slo_key == "gateway_uptime_pct":
+            ok_count = sum(
+                1 for s in snapshots
+                if any(c["name"] == "gateway_process" and c["status"] == "ok"
+                       for c in s.get("checks", []))
+            )
+            actual = 100.0 * ok_count / total
+            met = actual >= slo["target"]
+            print(f"    Actual: {actual:.2f}%  {'✅ MET' if met else '❌ MISSED'}")
+        elif slo_key in ("webhook_latency_ms", "api_server_http_latency_ms"):
+            check_name = "webhook_http" if "webhook" in slo_key else "api_server_http"
+            vals = [
+                float(c["value"])
+                for s in snapshots
+                for c in s.get("checks", [])
+                if c["name"] == check_name and c.get("value") is not None
+            ]
+            if vals:
+                vals.sort()
+                p95_idx = int(len(vals) * 0.95)
+                p95 = vals[min(p95_idx, len(vals) - 1)]
+                met = p95 <= slo["target"]
+                print(f"    p95:    {p95:.0f}ms  {'✅ MET' if met else '❌ MISSED'}")
+            else:
+                print(f"    Status: no latency data")
+    print()
+
+
+def print_history(cfg: ObservatoryConfig, count: int = 20) -> None:
+    """Print recent health records."""
+    snapshots = load_snapshots(cfg, days=RETENTION_DAYS)[:count]
+    if not snapshots:
+        print("No history available.")
+        return
+    print(f"\n{'='*60}")
+    print(f"  Last {min(count, len(snapshots))} health records")
+    print(f"{'='*60}")
+    for snap in snapshots:
+        ts = snap.get("ts", "?")
+        overall = snap.get("overall", "?")
+        emoji = _status_emoji(overall)
+        degraded = [c["name"] for c in snap.get("checks", []) if c["status"] != "ok"]
+        degraded_str = f" — issues: {', '.join(degraded)}" if degraded else ""
+        print(f"  {emoji} {ts}  {overall.upper()}{degraded_str}")
+    print()
+
+
+# ---------------------------------------------------------------------------
+# Daemon mode
+# ---------------------------------------------------------------------------
+
+class Observatory:
+    """Continuous monitoring daemon."""
+
+    def __init__(self, cfg: ObservatoryConfig):
+        self.cfg = cfg
+        self._running = False
+        self._prev_snapshot: Optional[HealthSnapshot] = None
+
+    def _handle_signal(self, signum: int, frame: Any) -> None:
+        logger.info("Received signal %d, shutting down...", signum)
+        self._running = False
+
+    def run_once(self) -> HealthSnapshot:
+        snapshot = collect_snapshot(self.cfg)
+        store_snapshot(self.cfg, snapshot)
+        alerts = maybe_alert(self.cfg, snapshot, self._prev_snapshot)
+        if alerts:
+            logger.info("Sent %d alert(s)", len(alerts))
+        self._prev_snapshot = snapshot
+        return snapshot
+
+    def run(self) -> None:
+        _init_db(self.cfg.db_path)
+        logger.info(
+            "Observatory starting — poll_interval=%ds db=%s",
+            self.cfg.poll_interval,
+            self.cfg.db_path,
+        )
+        self._running = True
+        signal.signal(signal.SIGINT, self._handle_signal)
+        signal.signal(signal.SIGTERM, self._handle_signal)
+
+        while self._running:
+            try:
+                snapshot = self.run_once()
+                logger.info("Health check: %s", snapshot.overall_status)
+            except Exception as exc:
+                logger.error("Health check failed: %s", exc, exc_info=True)
+            if self._running:
+                time.sleep(self.cfg.poll_interval)
+
+        logger.info("Observatory stopped.")
+
+
+# ---------------------------------------------------------------------------
+# CLI entry point
+# ---------------------------------------------------------------------------
+
+def main(argv: Optional[List[str]] = None) -> int:
+    parser = argparse.ArgumentParser(
+        description="Hermes Observatory — health monitoring & alerting",
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+    )
+    parser.add_argument("--check", action="store_true", help="Run one health check and print results")
+    parser.add_argument("--daemon", action="store_true", help="Run as continuous monitoring daemon")
+    parser.add_argument("--digest", action="store_true", help="Print (and optionally send) daily digest")
+    parser.add_argument("--history", type=int, metavar="N", help="Show last N health records")
+    parser.add_argument("--slo", action="store_true", help="Print SLO report")
+    parser.add_argument("--send-digest", action="store_true", help="Send daily digest via Telegram")
+    parser.add_argument("--verbose", "-v", action="store_true", help="Enable verbose logging")
+
+    args = parser.parse_args(argv)
+
+    logging.basicConfig(
+        level=logging.DEBUG if args.verbose else logging.INFO,
+        format="%(asctime)s %(levelname)s [observatory] %(message)s",
+    )
+
+    cfg = ObservatoryConfig.from_env()
+    _init_db(cfg.db_path)
+
+    if args.check:
+        snapshot = collect_snapshot(cfg)
+        store_snapshot(cfg, snapshot)
+        print_snapshot(snapshot)
+        return 0 if snapshot.overall_status == "ok" else 1
+
+    if args.daemon:
+        obs = Observatory(cfg)
+        obs.run()
+        return 0
+
+    if args.digest or args.send_digest:
+        digest = build_digest(cfg)
+        print(digest)
+        if args.send_digest:
+            ok = send_digest(cfg)
+            if ok:
+                print("\n[Digest sent to Telegram]")
+            else:
+                print("\n[Telegram send skipped — token/chat_id not configured]")
+        return 0
+
+    if args.history is not None:
+        print_history(cfg, args.history)
+        return 0
+
+    if args.slo:
+        print_slo_report(cfg)
+        return 0
+
+    # Default: one-shot check
+    snapshot = collect_snapshot(cfg)
+    store_snapshot(cfg, snapshot)
+    print_snapshot(snapshot)
+    return 0 if snapshot.overall_status == "ok" else 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())

pyproject.toml

@@ -42,6 +42,7 @@ dependencies = [
 modal = ["modal>=1.0.0,<2"]
 daytona = ["daytona>=0.148.0,<1"]
 dev = ["pytest>=9.0.2,<10", "pytest-asyncio>=1.3.0,<2", "pytest-xdist>=3.0,<4", "mcp>=1.2.0,<2"]
+observatory = ["psutil>=5.9.0,<7"]
 messaging = ["python-telegram-bot>=22.6,<23", "discord.py[voice]>=2.7.1,<3", "aiohttp>=3.13.3,<4", "slack-bolt>=1.18.0,<2", "slack-sdk>=3.27.0,<4"]
 cron = ["croniter>=6.0.0,<7"]
 slack = ["slack-bolt>=1.18.0,<2", "slack-sdk>=3.27.0,<4"]

tests/test_observatory.py

@@ -0,0 +1,455 @@
+"""
+Tests for observatory.py — health monitoring & alerting.
+
+Refs #147
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import sqlite3
+import sys
+import tempfile
+import time
+from pathlib import Path
+from typing import Any
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+PROJECT_ROOT = Path(__file__).parent.parent
+if str(PROJECT_ROOT) not in sys.path:
+    sys.path.insert(0, str(PROJECT_ROOT))
+
+import observatory as obs
+
+
+# ---------------------------------------------------------------------------
+# Fixtures
+# ---------------------------------------------------------------------------
+
+@pytest.fixture
+def cfg(tmp_path):
+    """Return an ObservatoryConfig pointing at a temp directory."""
+    cfg = obs.ObservatoryConfig()
+    cfg.db_path = tmp_path / "observatory.db"
+    cfg.alert_chat_id = "99999"
+    cfg.digest_chat_id = "99999"
+    cfg.telegram_token = "fake-token"
+    cfg.webhook_url = "http://127.0.0.1:19999/health"  # port never bound
+    cfg.api_url = "http://127.0.0.1:19998/health"
+    return cfg
+
+
+# ---------------------------------------------------------------------------
+# Config tests
+# ---------------------------------------------------------------------------
+
+class TestObservatoryConfig:
+    def test_defaults(self):
+        c = obs.ObservatoryConfig()
+        assert c.disk_warn_pct == 80.0
+        assert c.disk_crit_pct == 90.0
+        assert c.mem_warn_pct == 80.0
+        assert c.mem_crit_pct == 90.0
+        assert c.cpu_warn_pct == 80.0
+        assert c.cpu_crit_pct == 95.0
+        assert c.poll_interval == 60
+        assert c.webhook_latency_slo_ms == 2000.0
+        assert c.gateway_uptime_slo_pct == 99.5
+
+    def test_from_env_overrides(self, monkeypatch):
+        monkeypatch.setenv("OBSERVATORY_DISK_WARN_PCT", "70")
+        monkeypatch.setenv("OBSERVATORY_POLL_INTERVAL", "30")
+        monkeypatch.setenv("OBSERVATORY_ALERT_CHAT_ID", "12345")
+        monkeypatch.setenv("TELEGRAM_BOT_TOKEN", "tok123")
+        c = obs.ObservatoryConfig.from_env()
+        assert c.disk_warn_pct == 70.0
+        assert c.poll_interval == 30
+        assert c.alert_chat_id == "12345"
+        assert c.telegram_token == "tok123"
+
+    def test_digest_chat_falls_back_to_alert(self, monkeypatch):
+        monkeypatch.setenv("OBSERVATORY_ALERT_CHAT_ID", "abc")
+        monkeypatch.delenv("OBSERVATORY_DIGEST_CHAT_ID", raising=False)
+        c = obs.ObservatoryConfig.from_env()
+        assert c.digest_chat_id == "abc"
+
+
+# ---------------------------------------------------------------------------
+# CheckResult / HealthSnapshot tests
+# ---------------------------------------------------------------------------
+
+class TestHealthSnapshot:
+    def _make_snapshot(self, statuses):
+        checks = [obs.CheckResult(name=f"c{i}", status=s, message="") for i, s in enumerate(statuses)]
+        return obs.HealthSnapshot(ts="2026-01-01T00:00:00+00:00", checks=checks)
+
+    def test_overall_ok(self):
+        snap = self._make_snapshot(["ok", "ok"])
+        assert snap.overall_status == "ok"
+
+    def test_overall_warn(self):
+        snap = self._make_snapshot(["ok", "warn"])
+        assert snap.overall_status == "warn"
+
+    def test_overall_critical(self):
+        snap = self._make_snapshot(["ok", "warn", "critical"])
+        assert snap.overall_status == "critical"
+
+    def test_overall_error(self):
+        snap = self._make_snapshot(["ok", "error"])
+        assert snap.overall_status == "critical"
+
+    def test_to_dict(self):
+        snap = self._make_snapshot(["ok"])
+        d = snap.to_dict()
+        assert d["overall"] == "ok"
+        assert isinstance(d["checks"], list)
+        assert d["checks"][0]["name"] == "c0"
+
+
+# ---------------------------------------------------------------------------
+# Individual check tests
+# ---------------------------------------------------------------------------
+
+class TestCheckGatewayLiveness:
+    def test_running(self):
+        with patch("gateway.status.is_gateway_running", return_value=True), \
+             patch("gateway.status.get_running_pid", return_value=12345):
+            result = obs.check_gateway_liveness()
+        assert result.status == "ok"
+        assert "12345" in result.message
+
+    def test_not_running(self):
+        with patch("gateway.status.is_gateway_running", return_value=False), \
+             patch("gateway.status.get_running_pid", return_value=None):
+            result = obs.check_gateway_liveness()
+        assert result.status == "critical"
+
+    def test_import_error(self):
+        import builtins
+        real_import = builtins.__import__
+
+        def mock_import(name, *args, **kwargs):
+            if name == "gateway.status":
+                raise ImportError("no module")
+            return real_import(name, *args, **kwargs)
+
+        with patch("builtins.__import__", side_effect=mock_import):
+            result = obs.check_gateway_liveness()
+        assert result.status in ("error", "critical", "ok")  # graceful
+
+
+class TestCheckDisk:
+    def test_ok(self, cfg):
+        mock_usage = MagicMock()
+        mock_usage.percent = 50.0
+        mock_usage.free = 10 * 1024 ** 3
+        mock_usage.total = 20 * 1024 ** 3
+        with patch("psutil.disk_usage", return_value=mock_usage):
+            result = obs.check_disk(cfg)
+        assert result.status == "ok"
+        assert result.value == 50.0
+
+    def test_warn(self, cfg):
+        mock_usage = MagicMock()
+        mock_usage.percent = 85.0
+        mock_usage.free = 3 * 1024 ** 3
+        mock_usage.total = 20 * 1024 ** 3
+        with patch("psutil.disk_usage", return_value=mock_usage):
+            result = obs.check_disk(cfg)
+        assert result.status == "warn"
+
+    def test_critical(self, cfg):
+        mock_usage = MagicMock()
+        mock_usage.percent = 92.0
+        mock_usage.free = 1 * 1024 ** 3
+        mock_usage.total = 20 * 1024 ** 3
+        with patch("psutil.disk_usage", return_value=mock_usage):
+            result = obs.check_disk(cfg)
+        assert result.status == "critical"
+
+    def test_no_psutil(self, cfg, monkeypatch):
+        monkeypatch.setattr(obs, "_PSUTIL", False)
+        result = obs.check_disk(cfg)
+        assert result.status == "error"
+
+
+class TestCheckMemory:
+    def test_ok(self, cfg):
+        mock_mem = MagicMock()
+        mock_mem.percent = 60.0
+        mock_mem.available = 4 * 1024 ** 3
+        mock_mem.total = 16 * 1024 ** 3
+        with patch("psutil.virtual_memory", return_value=mock_mem):
+            result = obs.check_memory(cfg)
+        assert result.status == "ok"
+
+    def test_critical(self, cfg):
+        mock_mem = MagicMock()
+        mock_mem.percent = 95.0
+        mock_mem.available = 512 * 1024 ** 2
+        mock_mem.total = 16 * 1024 ** 3
+        with patch("psutil.virtual_memory", return_value=mock_mem):
+            result = obs.check_memory(cfg)
+        assert result.status == "critical"
+
+
+class TestCheckCPU:
+    def test_ok(self, cfg):
+        with patch("psutil.cpu_percent", return_value=40.0):
+            result = obs.check_cpu(cfg)
+        assert result.status == "ok"
+
+    def test_warn(self, cfg):
+        with patch("psutil.cpu_percent", return_value=85.0):
+            result = obs.check_cpu(cfg)
+        assert result.status == "warn"
+
+    def test_critical(self, cfg):
+        with patch("psutil.cpu_percent", return_value=98.0):
+            result = obs.check_cpu(cfg)
+        assert result.status == "critical"
+
+
+class TestCheckDatabase:
+    def test_ok(self, cfg):
+        obs._init_db(cfg.db_path)
+        result = obs.check_database(cfg)
+        assert result.status == "ok"
+
+    def test_not_yet_created(self, cfg):
+        # db_path does not exist
+        result = obs.check_database(cfg)
+        assert result.status == "warn"
+
+
+class TestCheckHTTP:
+    def test_webhook_connection_refused(self, cfg):
+        result = obs.check_webhook_http(cfg)
+        # Port 19999 is not bound — should get a "not reachable" warn
+        assert result.status in ("warn", "error")
+
+    def test_api_server_connection_refused(self, cfg):
+        result = obs.check_api_server_http(cfg)
+        assert result.status in ("warn", "error")
+
+    def test_webhook_ok(self, cfg):
+        import urllib.error
+        from unittest.mock import patch, MagicMock
+        mock_resp = MagicMock()
+        mock_resp.__enter__ = lambda s: s
+        mock_resp.__exit__ = MagicMock(return_value=False)
+        mock_resp.status = 200
+        mock_resp.read.return_value = b'{"status":"ok"}'
+        with patch("urllib.request.urlopen", return_value=mock_resp):
+            result = obs.check_webhook_http(cfg)
+        assert result.status in ("ok", "warn")
+
+    def test_webhook_http_error(self, cfg):
+        mock_resp = MagicMock()
+        mock_resp.__enter__ = lambda s: s
+        mock_resp.__exit__ = MagicMock(return_value=False)
+        mock_resp.status = 503
+        with patch("urllib.request.urlopen", return_value=mock_resp):
+            result = obs.check_webhook_http(cfg)
+        assert result.status == "critical"
+
+
+# ---------------------------------------------------------------------------
+# Persistence tests
+# ---------------------------------------------------------------------------
+
+class TestPersistence:
+    def test_store_and_load(self, cfg):
+        obs._init_db(cfg.db_path)
+        from datetime import datetime, timezone
+        ts = datetime.now(timezone.utc).isoformat()
+        snap = obs.HealthSnapshot(
+            ts=ts,
+            checks=[obs.CheckResult(name="test", status="ok", message="fine")],
+        )
+        obs.store_snapshot(cfg, snap)
+        loaded = obs.load_snapshots(cfg, days=30)
+        assert len(loaded) == 1
+        assert loaded[0]["overall"] == "ok"
+
+    def test_retention_pruning(self, cfg):
+        obs._init_db(cfg.db_path)
+        # Insert an old record directly
+        with obs._db(cfg.db_path) as conn:
+            conn.execute(
+                "INSERT INTO health_snapshots (ts, overall, payload) VALUES (?, ?, ?)",
+                ("2000-01-01T00:00:00+00:00", "ok", '{"ts":"2000-01-01T00:00:00+00:00","overall":"ok","checks":[]}'),
+            )
+        snap = obs.HealthSnapshot(
+            ts="2026-01-01T00:00:00+00:00",
+            checks=[],
+        )
+        obs.store_snapshot(cfg, snap)
+        # Old record should have been pruned
+        with obs._db(cfg.db_path) as conn:
+            count = conn.execute("SELECT count(*) FROM health_snapshots WHERE ts < '2001-01-01'").fetchone()[0]
+        assert count == 0
+
+    def test_record_alert_sent(self, cfg):
+        obs._init_db(cfg.db_path)
+        obs.record_alert_sent(cfg, "gateway_process", "critical", "not running")
+        with obs._db(cfg.db_path) as conn:
+            count = conn.execute("SELECT count(*) FROM alerts_sent").fetchone()[0]
+        assert count == 1
+
+
+# ---------------------------------------------------------------------------
+# Alerting tests
+# ---------------------------------------------------------------------------
+
+class TestAlerting:
+    def _snap(self, status):
+        return obs.HealthSnapshot(
+            ts="2026-01-01T00:00:00+00:00",
+            checks=[obs.CheckResult(name="gateway_process", status=status, message="test")],
+        )
+
+    def test_no_alert_when_ok(self, cfg):
+        snap = self._snap("ok")
+        prev = self._snap("ok")
+        obs._init_db(cfg.db_path)
+        with patch("observatory._telegram_send", return_value=True) as mock_send:
+            alerts = obs.maybe_alert(cfg, snap, prev)
+        mock_send.assert_not_called()
+        assert alerts == []
+
+    def test_alert_on_new_critical(self, cfg):
+        snap = self._snap("critical")
+        prev = self._snap("ok")
+        obs._init_db(cfg.db_path)
+        with patch("observatory._telegram_send", return_value=True) as mock_send:
+            alerts = obs.maybe_alert(cfg, snap, prev)
+        mock_send.assert_called_once()
+        assert len(alerts) == 1
+
+    def test_no_duplicate_alert(self, cfg):
+        snap = self._snap("critical")
+        prev = self._snap("critical")  # already critical
+        obs._init_db(cfg.db_path)
+        with patch("observatory._telegram_send", return_value=True) as mock_send:
+            alerts = obs.maybe_alert(cfg, snap, prev)
+        mock_send.assert_not_called()
+        assert alerts == []
+
+    def test_recovery_alert(self, cfg):
+        snap = self._snap("ok")
+        prev = self._snap("critical")
+        obs._init_db(cfg.db_path)
+        with patch("observatory._telegram_send", return_value=True) as mock_send:
+            alerts = obs.maybe_alert(cfg, snap, prev)
+        mock_send.assert_called_once()
+
+    def test_no_alert_without_token(self, cfg):
+        cfg.telegram_token = None
+        snap = self._snap("critical")
+        obs._init_db(cfg.db_path)
+        alerts = obs.maybe_alert(cfg, snap, None)
+        assert alerts == []
+
+    def test_no_alert_without_chat_id(self, cfg):
+        cfg.alert_chat_id = None
+        snap = self._snap("critical")
+        obs._init_db(cfg.db_path)
+        alerts = obs.maybe_alert(cfg, snap, None)
+        assert alerts == []
+
+
+# ---------------------------------------------------------------------------
+# Digest tests
+# ---------------------------------------------------------------------------
+
+class TestDigest:
+    def test_empty_digest(self, cfg):
+        obs._init_db(cfg.db_path)
+        digest = obs.build_digest(cfg)
+        assert "no health data" in digest.lower() or "24 hours" in digest.lower()
+
+    def test_digest_with_data(self, cfg):
+        obs._init_db(cfg.db_path)
+        from datetime import datetime, timezone, timedelta
+        ts = (datetime.now(timezone.utc) - timedelta(hours=1)).isoformat()
+        snap = obs.HealthSnapshot(
+            ts=ts,
+            checks=[
+                obs.CheckResult(name="gateway_process", status="ok", message="running"),
+                obs.CheckResult(name="disk", status="ok", message="50% used", value=50.0, unit="%"),
+                obs.CheckResult(name="webhook_http", status="ok", message="ok", value=150.0, unit="ms"),
+            ],
+        )
+        obs.store_snapshot(cfg, snap)
+        digest = obs.build_digest(cfg)
+        assert "Daily Digest" in digest
+        assert "Gateway" in digest or "gateway" in digest
+
+    def test_send_digest_no_token(self, cfg):
+        cfg.telegram_token = None
+        obs._init_db(cfg.db_path)
+        result = obs.send_digest(cfg)
+        assert result is False
+
+
+# ---------------------------------------------------------------------------
+# SLO tests
+# ---------------------------------------------------------------------------
+
+class TestSLO:
+    def test_slo_definitions_complete(self):
+        assert "gateway_uptime_pct" in obs.SLO_DEFINITIONS
+        assert "webhook_latency_ms" in obs.SLO_DEFINITIONS
+        assert "api_server_latency_ms" in obs.SLO_DEFINITIONS
+
+    def test_slo_targets(self):
+        assert obs.SLO_DEFINITIONS["gateway_uptime_pct"]["target"] == 99.5
+        assert obs.SLO_DEFINITIONS["webhook_latency_ms"]["target"] == 2000
+
+
+# ---------------------------------------------------------------------------
+# CLI tests
+# ---------------------------------------------------------------------------
+
+class TestCLI:
+    def test_check_exits_0_on_ok(self, cfg, monkeypatch, tmp_path):
+        monkeypatch.setenv("OBSERVATORY_DB_PATH", str(tmp_path / "obs.db"))
+        ok_snap = obs.HealthSnapshot(
+            ts="2026-01-01T00:00:00+00:00",
+            checks=[obs.CheckResult(name="all_good", status="ok", message="fine")],
+        )
+        with patch("observatory.collect_snapshot", return_value=ok_snap), \
+             patch("observatory.store_snapshot"):
+            rc = obs.main(["--check"])
+        assert rc == 0
+
+    def test_check_exits_nonzero_on_critical(self, cfg, monkeypatch, tmp_path):
+        monkeypatch.setenv("OBSERVATORY_DB_PATH", str(tmp_path / "obs.db"))
+        bad_snap = obs.HealthSnapshot(
+            ts="2026-01-01T00:00:00+00:00",
+            checks=[obs.CheckResult(name="gateway_process", status="critical", message="down")],
+        )
+        with patch("observatory.collect_snapshot", return_value=bad_snap), \
+             patch("observatory.store_snapshot"):
+            rc = obs.main(["--check"])
+        assert rc != 0
+
+    def test_digest_flag(self, monkeypatch, tmp_path):
+        monkeypatch.setenv("OBSERVATORY_DB_PATH", str(tmp_path / "obs.db"))
+        rc = obs.main(["--digest"])
+        assert rc == 0
+
+    def test_slo_flag(self, monkeypatch, tmp_path):
+        monkeypatch.setenv("OBSERVATORY_DB_PATH", str(tmp_path / "obs.db"))
+        rc = obs.main(["--slo"])
+        assert rc == 0
+
+    def test_history_flag(self, monkeypatch, tmp_path):
+        monkeypatch.setenv("OBSERVATORY_DB_PATH", str(tmp_path / "obs.db"))
+        rc = obs.main(["--history", "5"])
+        assert rc == 0