feat(apply-fix): tool-augmented Claude can explore + patch any repo - #15
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Replaces the single-shot Apply Fix with an agentic loop: Claude has tools to navigate the repository and stages writes until it's satisfied. The previous implementation pre-loaded a heuristic set of files (e.g. "robots.* finding → public/robots.txt") and asked for a one-shot patch; that failed any time the file lived somewhere we didn't anticipate. Tools exposed to Claude: - list_directory(path): list immediate children of a path. Use "" for root. - read_file(path): read file contents from the default branch. Truncates at 50KB to bound token usage. - search_code(query): GitHub Code Search for a literal substring across the repo. Useful for finding components / patterns in monorepos. - write_file(path, content): STAGE a write. Buffered until done(). - done(summary): signal completion with a PR-body-ready explanation. Safety / cost limits hardcoded: - 20 iteration cap. - 50KB per file read, 100KB per file write, 200KB total writes. - 100 dir entries per list. - Blocklist for generated / vendored paths (.git, node_modules, dist, build, .next, .cache, coverage, *.lock, pnpm-lock.yaml, etc.). - Prompt cache on the static system prompt + tools block via cache_control: ephemeral — drops typical input cost ~80% per turn. Cost expectation: ~$0.10 typical, ~$0.40 worst-case (per fix). Still 1 credit; healthy margin at $0.50-$1.00 per credit. API changes: - POST /api/projects/[id]/github/apply-fix now also accepts root_path as an optional monorepo hint. Threaded to applyFix() which passes the hint into the user prompt. - maxDuration bumped to 300s for the worst-case 20-turn loop. Existing UI / credit accounting / refund-on-failure unchanged. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Replaces single-shot Apply Fix with an agentic loop. Claude gets list_directory / read_file / search_code / write_file / done tools and explores the repo until it stages a fix. Cap: 20 iterations, 200KB total writes, blocklist for vendored paths. Prompt-cached system+tools block. ~$0.10 typical / $0.40 worst-case Claude cost — 1 credit covers it comfortably.