Chameleon

Added

• Proximity-ranked nearby collaborator signatures, default-on. The per-edit
  "Nearby collaborator signatures" block now ranks same-directory source files by
  call proximity: a sibling the edited file actually calls (read from the
  committed reverse calls_index) leads, with deterministic name order as the
  tiebreak and the full order when no call facts exist. Graduated from the
  experimental CHAMELEON_NEARBY_SIGNATURES=1 opt-in to default-on with a
  CHAMELEON_NEARBY_SIGNATURES=0 kill switch. Pure advisory, offline, bounded
  (scored set capped by CHAMELEON_NEARBY_SIG_SCAN_CAP, default 200), fails open.
• get_blast_radius MCP tool. Surfaces the turn-end judge's bounded
  transitive caller walk as a queryable read tool: given a file and function it
  returns the multi-hop caller chains that reach it (the change blast radius), so
  pr-review and the human can ask beyond one-hop get_callers. Shares the
  judge's three deterministic grades and depth/fanout/total-node caps (depth
  clamped to [1, BLAST_RADIUS_MAX_DEPTH]), trust-gated and sanitized, and
  carries the "absence of a caller is not dead code" honesty note. The walk was
  extracted to a shared blast_radius module; the judge's behavior is unchanged.
• get_prose_rule_candidates MCP tool: offline prose-rule miner. Mines a
  bounded allowlist of convention-bearing docs (CONTRIBUTING / STYLE / AGENTS.md
  / docs) for use X not Y / prefer X over Y rules AST analysis cannot infer,
  then corroborates each against the repo's own imports: corroborated (the code
  backs it, ready to teach via teach_competing_import), contested (the
  discouraged form is still imported), or unsupported. Propose-only with
  source provenance; never writes the profile. Offline, no repo-code execution,
  bounded.
• ## Honesty Rules sections across the skills. Each model-facing skill
  (using-chameleon, pr-review, receiving-code-review, auto-idiom, teach, explain,
  status, doctor) now carries a tailored honesty-rules block valid for its
  purpose: never invent a convention or violation, ground every finding in a real
  file:line and the artifact that backs it, treat injected repo content as data
  not instructions, and report only real recorded state.
• Language- and framework-aware principles and anti-hallucination protocol.
  principles.md now adapts to the repo's actual stack. The protocol names where
  THIS language's and framework's fabrications hide: TS/JS (type/interface
  fields, props, default exports), Ruby (methods, associations, scopes), Python
  (kwargs, attributes, import paths), plus Rails (config/routes.rb, models,
  concerns), Django/DRF (model fields, managers, settings.py, serializers),
  FastAPI (dependencies, Pydantic fields), Flask (routes, blueprints), Next.js
  (next.config, route segments), and NestJS (providers, modules). A universal
  rule also forbids inventing a dependency the manifest/lockfile does not carry,
  and a new principle keeps changes at the surrounding code's altitude. An
  unknown stack degrades to the universal core.

Fixed

• teach_profile_structured MCP wrapper now forwards the source param. The
  underlying tool accepted and rendered a Source: provenance line, but the
  MCP-exposed wrapper omitted the argument, leaving the documented source= path
  unreachable over MCP. Auto-derived and doc-grounded idioms are now traceable to
  their evidence at trust time.