- token_estimator.go (new): TokenEstimator with ~4 chars/token heuristic,
EstimateText/EstimateMessages methods, TruncateMessages sliding window
that drops oldest messages to fit token budget, BuildContextWindow
entry point that converts conversation messages to LLM format with
token-budgeted truncation (default 4096 tokens)
- copilot_context_service.go: fetch up to 100 messages (was 20), then
apply BuildContextWindow truncation to fit within 4096 token budget;
log how many messages were dropped
Verified: go build + go vet + go test all pass
Semantic search route reaches handler (times out on LLM call without API key,
confirming route + service wiring is correct)
rogee
6d8eda28b5