Tip: briefd answers 'what do I need to know for this task' instead of re-sending CLAUDE.md every turn

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briefd (Go, Apache-2.0, created 2026-09-20) indexes a git repo of Markdown knowledge and exposes one MCP call, `compile_bundle`, that returns a deduplicated bundle under a token budget you set. On its own benchmark of 44 documents and 47 developer tasks, a 2,000-token bundle costs 1,800 tokens and contains the answering section 96% of the time, against 12,869 tokens at 100% for pasting everything into CLAUDE.md and 4,946 tokens at under 50% for a hand-curated CLAUDE.md. The benchmark is the author's own and is reproducible with `make bench` against `internal/eval/bench.go`, so treat the 86% figure as a self-reported but inspectable number.