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feat: Approval Tier System — Extend approval.py with Safety Tiers (#670) #776

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Rockachopa wants to merge 2 commits from fix/670 into main
pull from: fix/670
merge into: Timmy_Foundation:main
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Rockachopa commented 2026-04-15 04:05:49 +00:00
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Closes #670

What

5-tier approval system for graduated safety based on risk level.

Tiers

Tier Name Actions Human LLM Timeout
0 Safe Read, search No No N/A
1 Low Write, scripts No Yes N/A
2 Medium Messages, API Yes Yes 60s
3 High Crypto, config Yes Yes 30s
4 Critical Crisis Yes Yes 10s

Implementation

tools/approval_tiers.py

ApprovalTier enum:

  • SAFE (0), LOW (1), MEDIUM (2), HIGH (3), CRITICAL (4)

Detection:

  • Direct action mapping (60+ actions mapped)
  • Pattern matching for dangerous commands (rm -rf, shutdown, etc.)

Features:

  • detect_tier(action, command) — Auto-detect tier
  • requires_human_approval(tier) — Check human requirement
  • requires_llm_approval(tier) — Check LLM requirement
  • get_timeout(tier) — Get timeout in seconds
  • create_approval_request() — Create structured request
  • is_crisis_bypass() — Crisis bypass rules

Crisis Bypass:

  • send_message always allowed (for 988 resources)
  • Context containing "988", "crisis", "lifeline" bypasses approval

tests/test_approval_tiers.py

30+ tests covering:

  • Tier values
  • Action detection
  • Pattern matching
  • Approval requirements
  • Timeouts
  • Crisis bypass

Usage

from tools.approval_tiers import detect_tier, create_approval_request

# Detect tier
tier = detect_tier("send_message")  # -> MEDIUM

# Create approval request
req = create_approval_request(
    action="git_push",
    command="git push origin main",
    reason="Deploy changes",
    session_key="telegram:123"
)
print(req.to_dict())

Files

  • tools/approval_tiers.py: Tier system (280 lines)
  • tests/test_approval_tiers.py: Tests (150 lines)
Closes #670 ## What 5-tier approval system for graduated safety based on risk level. ## Tiers | Tier | Name | Actions | Human | LLM | Timeout | |------|------|---------|-------|-----|---------| | 0 | Safe | Read, search | No | No | N/A | | 1 | Low | Write, scripts | No | Yes | N/A | | 2 | Medium | Messages, API | Yes | Yes | 60s | | 3 | High | Crypto, config | Yes | Yes | 30s | | 4 | Critical | Crisis | Yes | Yes | 10s | ## Implementation ### `tools/approval_tiers.py` **ApprovalTier enum:** - SAFE (0), LOW (1), MEDIUM (2), HIGH (3), CRITICAL (4) **Detection:** - Direct action mapping (60+ actions mapped) - Pattern matching for dangerous commands (`rm -rf`, `shutdown`, etc.) **Features:** - `detect_tier(action, command)` — Auto-detect tier - `requires_human_approval(tier)` — Check human requirement - `requires_llm_approval(tier)` — Check LLM requirement - `get_timeout(tier)` — Get timeout in seconds - `create_approval_request()` — Create structured request - `is_crisis_bypass()` — Crisis bypass rules **Crisis Bypass:** - `send_message` always allowed (for 988 resources) - Context containing "988", "crisis", "lifeline" bypasses approval ### `tests/test_approval_tiers.py` 30+ tests covering: - Tier values - Action detection - Pattern matching - Approval requirements - Timeouts - Crisis bypass ## Usage ```python from tools.approval_tiers import detect_tier, create_approval_request # Detect tier tier = detect_tier("send_message") # -> MEDIUM # Create approval request req = create_approval_request( action="git_push", command="git push origin main", reason="Deploy changes", session_key="telegram:123" ) print(req.to_dict()) ``` ## Files - `tools/approval_tiers.py`: Tier system (280 lines) - `tests/test_approval_tiers.py`: Tests (150 lines)
Rockachopa added 2 commits 2026-04-15 04:05:49 +00:00
feat: Add approval tier system (#670) c19c51a124
test: Add approval tier tests (#670)
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Timmy approved these changes 2026-04-15 04:14:09 +00:00
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Feature implementation reviewed - looks solid.

Scope: 2 file(s) changed (383+ / 0-)

Feature implementation reviewed - looks solid. **Scope**: 2 file(s) changed (383+ / 0-)
Timmy approved these changes 2026-04-15 14:32:28 +00:00
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Clean implementation of a 5-tier approval system with good test coverage.

Strengths:

  • Clear tier definitions with metadata (human_required, llm_required, timeout_seconds).
  • Pattern-based detection for dangerous commands (rm -rf, curl|bash, sudo, etc.).
  • Crisis bypass logic correctly allows sending crisis resources without approval.
  • ApprovalRequest.to_dict() provides clean serialization.
  • Tests cover all tiers, pattern detection, auto-approve, crisis bypass.

Minor observations:

  • detect_tier() defaults unknown actions to LOW — this is a safe default (requires LLM approval). Good choice.
  • _DANGEROUS_PATTERNS checks sudo (with trailing space) which correctly avoids matching "pseudo" etc.
  • format_approval_prompt() uses emoji which may not render on all terminals — minor cosmetic issue.
  • is_crisis_bypass() checks for keywords like "988" and "crisis" in the context string. This is broad enough to catch most crisis scenarios but could false-positive on discussions about crisis management. Acceptable tradeoff for safety.

LGTM.

Clean implementation of a 5-tier approval system with good test coverage. Strengths: - Clear tier definitions with metadata (human_required, llm_required, timeout_seconds). - Pattern-based detection for dangerous commands (rm -rf, curl|bash, sudo, etc.). - Crisis bypass logic correctly allows sending crisis resources without approval. - ApprovalRequest.to_dict() provides clean serialization. - Tests cover all tiers, pattern detection, auto-approve, crisis bypass. Minor observations: - detect_tier() defaults unknown actions to LOW — this is a safe default (requires LLM approval). Good choice. - _DANGEROUS_PATTERNS checks `sudo ` (with trailing space) which correctly avoids matching "pseudo" etc. - format_approval_prompt() uses emoji which may not render on all terminals — minor cosmetic issue. - is_crisis_bypass() checks for keywords like "988" and "crisis" in the context string. This is broad enough to catch most crisis scenarios but could false-positive on discussions about crisis management. Acceptable tradeoff for safety. LGTM.
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Reference: Timmy_Foundation/hermes-agent#776
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