[rennf93]

Follow-up to #105. The hand-written _knowledge/ corpus and the versions example in docs/tools.md still described the 4.2.0/3.1.0 train, and several of the corpus facts no longer matched the repos. I checked each one against a shallow clone of every repo at its release tag (guard-core-go v4.4.1, guard-core-php v4.4.0, guard-core-rs v4.4.0, the four agents at v3.2.4, guard-core-app master at tag 2026.10.21).

1. manifest.json: versions now match the tags (the versions tool reports them as knowledge_bundled_for), and the 7 rennf93/ site URLs point at Guard-Core/.
2. Versions, tags and install lines in every index.md. guard-agent-php's User-Agent is guard-agent-php/3.2.4 (src/Version.php:17), not guard-agent/3.1.0.
3. Facts that had drifted:
   • Go: go 1.26.0 and the full direct-dependency list. The README now carries usage, and a SKILL.md ships under guardcore/.agents/. The runners and Go xfail files are listed by name.
   • guard-agent-go: its packages still import only go-redis, but go.mod requires guard-core-go/v4 for examples/basic_usage and the build-info version lookup in version.go.
   • PHP:
     • AGENTS.md exists, and the README has 364 lines.
     • The PCRE2 note now follows the README's "Detection limits" section: the affected pattern families are skipped above 15360 bytes, where the note said the engine fails with a 500.
     • Adapters resolve the engine from Packagist with no path repository.
     • bin/conformance_cost.php exists, but no Makefile target, composer script or workflow runs it.
     • guard-agent-php also requires ext-openssl, and the adapters forward an optional agentHandler (GuardEngine::setAgentHandler()).
   • Rust:
     • xfail_baseline.toml is no longer empty: it holds 6 safety_gates cases.
     • The gaps now quote docs/configuration.md, where the corpus previously cited old behavior-rule and route-order gaps that it no longer lists.
     • docs/ exists, and CLAUDE.md is no longer a copy of AGENTS.md.
     • guard-agent-rs has an optional guard-core feature (bridge::GuardAgentTelemetry).
   • guard-core-app: a SKILL.md ships under backend/guard-core-api/guard_core_api/.agents/, and TelemetryResponse has eight fields (telemetry_models.py:48-58).
4. ecosystem.py: the Go, PHP and Rust agent integration text follows the same facts. fix(registry): re-sync the ecosystem registry to the shipped 4.4 engines and 3.2.4 agents #105 wrongly listed bin/conformance_cost.php among the runners, and the PHP conformance line now names the runners make test actually runs.
5. docs/tools.md: the example is the real versions() output from this branch.

Local run: uv run pytest 157 passed; pre-commit on the changed files, ruff, mypy and pymarkdownlnt on docs/tools.md all pass.

Not changed: the vendored _docs/ (docs-drift passes on master), the release version, and the CHANGELOG.