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Alexander Payne d9e556d4c1 fix: Upgrade model to llama3.1:8b-instruct + fix git tool cwd

Change 1: Model Upgrade (Primary Fix)
- Changed default model from llama3.2 to llama3.1:8b-instruct
- llama3.1:8b-instruct is fine-tuned for reliable tool/function calling
- llama3.2 (3B) consistently hallucinated tool output in testing
- Added fallback to qwen2.5:14b if primary unavailable

Change 2: Structured Output Foundation
- Enhanced session init to load real data on first message
- Preparation for JSON schema enforcement

Change 3: Git Tool Working Directory Fix
- Rewrote git_tools.py to use subprocess with cwd=REPO_ROOT
- REPO_ROOT auto-detected at module load time
- All git commands now run from correct directory

Change 4: Session Init with Git Log
- _session_init() reads git log --oneline -15 on first message
- Recent commits prepended to system prompt
- Timmy can now answer 'what's new?' from actual commit data

Change 5: Documentation
- Updated README with new model requirement
- Added CHANGELOG_2025-02-27.md

User must run: ollama pull llama3.1:8b-instruct

All 18 git tool tests pass.

2026-02-26 13:42:36 -05:00

2.3 KiB

Raw Blame History

Changelog — 2025-02-27

Model Upgrade & Hallucination Fix

Change 1: Model Upgrade (Primary Fix)

Problem: llama3.2 (3B parameters) consistently hallucinated tool output instead of waiting for real results.

Solution: Upgraded default model to llama3.1:8b-instruct which is specifically fine-tuned for reliable tool/function calling.

Changes:

src/config.py: Changed ollama_model default from llama3.2 to llama3.1:8b-instruct
Added fallback logic: if primary model unavailable, auto-fallback to qwen2.5:14b
README.md: Updated setup instructions with new model requirement

User Action Required:

ollama pull llama3.1:8b-instruct

Change 2: Structured Output Enforcement (Foundation)

Preparation: Added infrastructure for two-phase tool calling with JSON schema enforcement.

Implementation:

Session context tracking in TimmyOrchestrator
_session_init() runs on first message to load real data

Change 3: Git Tool Working Directory Fix

Problem: Git tools failed with "fatal: Not a git repository" due to wrong working directory.

Solution:

Rewrote src/tools/git_tools.py to use subprocess with explicit cwd=REPO_ROOT
Added REPO_ROOT module-level constant auto-detected at import time
All git commands now run from the correct directory

Change 4: Session Init with Git Log

Problem: Timmy couldn't answer "what's new?" from real data.