fix(claude-code): redact home paths and raw content in episodic logging

[diazMelgarejo]

Fixes #66.

What

claude_code_post_tool.py persisted raw absolute paths and raw file
content/edit diffs into AGENT_LEARNINGS.jsonl — a durable, cross-session
log meant to be shared, diffed, and eventually exported via the data
flywheel. Two leak sites:

1. file_path values went into action/reflection unnormalized —
   /Users/<name>/... baked into every entry touching a file.
2. Edit/MultiEdit reflection used repr(old[:30])/repr(new[:30])
   (literal content), and the generic _reflection() fallback for
   unhandled tool types (Read, Grep, Glob, WebFetch, ...) embedded raw
   json.dumps(tool_input) whenever the result was under 80 chars — which
   is backwards, since a short absolute path is exactly the case most
   likely to leak in full.

Fix

• New _normalize_path() helper, pure stdlib, reuses the hook's own
  existing AGENT_ROOT resolution (no new dependency, no new config) —
  normalizes to project-relative or ~-relative form.
• Content/diff previews replaced with char counts ("Edited {path}: N chars -> M chars" instead of literal excerpts).
• _reflection()'s fallback branch now normalizes file_path/path/
  new_path before the length check, instead of dumping raw JSON.
• _detail()'s raw json.dumps(tool_input)[:300] fallback replaced with
  a small normalized-metadata dict (tool name, normalized path, content
  size / edit char counts) — same shape as the existing Bash-specific
  branch already used.

Testing

Extended tests/test_claude_code_hook.py with a new section (10b) — 8
checks across an Edit and a Write case, asserting no raw home path or
file content survives into a persisted entry. Full suite: 62/62 passing
(up from 54/54, all pre-existing checks still green).

python3 tests/test_claude_code_hook.py
  62/62 passed — all good

Note

Redact home-directory paths and raw content from episodic log entries in claude-code hook

• Adds _normalize_path in claude_code_post_tool.py to convert absolute paths to project-relative or ~-prefixed forms before persisting them.
• Updates _action_label, _reflection, and _detail to use normalized paths and character counts instead of raw file content or absolute paths.
• Adds a test in test_claude_code_hook.py asserting that episodic entries contain no raw home-directory paths or secret content.
• Behavioral Change: Edit reflections now report old/new character counts instead of string snippets; detail fields no longer contain raw tool input.

^{Macroscope summarized 81e0f1e.}

[diazMelgarejo]

Cross-ref: sibling fix in everything-claude-code for the same-shaped bug (raw tool-call payload into a durable, shareable artifact): affaan-m/ECC#2731