Files
hermes-agent/agent
BK Bot 5bbd0dbd86 fix(context): dedupe subdirectory hints by content digest and skip backup/vendor dirs
SubdirectoryHintTracker re-injected identical context files whenever the same
AGENTS.md was reachable through more than one path. Symlinked shared
workspaces, hardlinks, and timestamped backup copies all alias a single file,
so a normal session could ship the same 8KB of instructions two or three
times. Nothing deduped it and nothing excluded directories that only ever
hold copies.

Two changes:

* Track a sha256 of every injected hint body. Repeat content is skipped, and
  the working directory's own context file is seeded at construction so the
  copy prompt_builder already loaded at startup is never sent again.
* Skip directories that hold copies rather than authoritative context
  (backups, node_modules, venv, site-packages, .git, .Trash, vendor, caches).
  Screening is relative to working_dir, so a project that legitimately lives
  under vendor/ keeps discovering its own subdirectory hints.

Measured on a real session that touched a symlinked shared workspace:
3 injections / ~24,000 chars before, 1 injection / 8,112 chars after.

14 new tests cover symlink aliasing, byte-identical copies, working-dir
seeding, distinct content still being injected, each excluded directory name,
excluded ancestors, and the working-dir-inside-excluded-name case.
2026-08-03 20:43:34 +05:30
..