fix(gemini): add conversation history truncation to prevent O(N²) token cost growth

Browse Source

GeminiAgent sends the full conversation history with every API call,
causing quadratic token growth per session. A 100-observation session
sends ~30M cumulative input tokens. This ports the proven truncateHistory()
sliding window from OpenRouterAgent to GeminiAgent.

- Add CLAUDE_MEM_GEMINI_MAX_CONTEXT_MESSAGES (default: 20) and
  CLAUDE_MEM_GEMINI_MAX_TOKENS (default: 100000) settings
- Add truncateHistory() to GeminiAgent using shared estimateTokens()
- Always preserve at least the newest message to avoid empty API requests
- Add settings validation in SettingsRoutes (1-100 messages, 1K-1M tokens)
- Add regression tests for truncation and oversized single-prompt edge case

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

...

This commit is contained in:

vnz

2026-03-17 08:00:29 +01:00

parent e2a230286d

commit df1fb8bb89

8 changed files with 503 additions and 338 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

plugin/scripts/context-generator.cjs

+47 -47

File diff suppressed because one or more lines are too long

plugin/scripts/mcp-server.cjs

+24 -24

File diff suppressed because one or more lines are too long

plugin/scripts/worker-service.cjs

+253 -250

File diff suppressed because one or more lines are too long

plugin/ui/viewer-bundle.js

+12 -12

File diff suppressed because one or more lines are too long