fix(tool-web): bound conversion depth and complete fetch output

Two review findings on the turndown swap, both verified empirically:

- Unclosed-tag nesting makes the synchronous turndown/domino walk
  superlinear (measured: depth 512 ~0.15s, 2k ~2s, 20k ~5s), during
  which the cooperative fetchTimeoutMs timer cannot fire. renderBody
  now preflights nesting depth with a linear tag scan and passes
  bodies past 512 levels through raw; the try/catch stays for markup
  the scan cannot see (comment-hidden tags), simulated in tests via a
  converter throw.
- Markdown escaping can expand converted HTML ~2x (100k underscores
  render as 200k chars), so provider body caps no longer bounded the
  model-visible result. formatFetchOutput now caps the complete output
  (header + body + footer) under new fetchMaxOutputChars config
  (default 200000 = 2x the local provider's default body cap), reusing
  the truncation notice.

README EN+ZH, config catalog, Agent Note EN+ZH updated; the new
web-fetch fixture is migrated to the packed layout master now
requires; tool-web coverage stays 100% per-file.
This commit is contained in:
Tianyi Cui
2026-07-27 12:41:36 +08:00
parent 67b6610e9f
commit 109b469a7e
11 changed files with 172 additions and 137 deletions

View File

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