Bohan Jiang 4233e82441 fix(skills): tree-first skill import to stop 504 on large repos (MUL-5136) (#5753) ...

Rework skills.sh and github.com skill imports around a single recursive
git-tree fetch to stop the 504 on large mono-repos (e.g. api-gateway-skill):

- One tree call replaces the per-directory contents crawl.
- Import caps checked arithmetically from tree metadata before any download
  (fail fast with 413 instead of timing out).
- Most-specific skill-dir resolution; repo root only as a last resort, which
  fixes the root SKILL.md name collision.
- Concurrent downloads (errgroup, limit 8).
- Overall 45s fetch deadline; cancellation is fatal on every supporting-file
  path (tree downloader, crawl listing/recursion/download, ClawHub) so a
  mid-download abort never persists a half-populated bundle.
- A skills.sh tree-fetch failure returns a retryable 503 instead of an unsafe
  root-directory fallback.
- Lenient conventional-path acceptance restored for both complete and truncated
  trees.
- maxImportFileCount 128 -> 256 (aligned daemon cap); 8 MiB bundle cap remains
  the real guard.

2026-07-22 14:38:31 +08:00

59 KiB

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