fix: AGENTIC licence line + a2ml-validate-action repin

[hyperpolymath]

Ruleset refused a direct push, so this lands by PR. Two mechanical fixes, owner-ruled:

1. AGENTIC licence line — Never use AGPL license (…) contradicts LICENCE-POLICY.adoc Rules 3/4/5 (which mandate AGPL for their scopes). Replaced with the policy pointer used in rsr-template-repo#45. See standards#646.
2. a2ml-validate-action repin — the previously-pinned SHAs never existed; the repo was only created 2026-08-28 (split from a2ml/actions/validate, history preserved). Repinned to its real HEAD. See standards#669.

🤖 Generated with Claude Code

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

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[coderabbitai]

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Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 4448230a-415c-4f82-87af-e415a53175bc

📥 Commits

Reviewing files that changed from the base of the PR and between 036fd84 and b64ca56.

📒 Files selected for processing (1)

• .machine_readable/6a2/AGENTIC.a2ml

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📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Clarified licensing guidance for contributed code and prose.
  • Added rules covering existing-file licensing, licence reviews, and the required policy reference.
  • Documented when alternative licences may apply, including co-developed work, network-deployed services, and games.
  • Updated the default licensing guidance to distinguish between software and written content.

Walkthrough

The agent licensing constraints now reference standards/LICENCE-POLICY.adoc. They prohibit relicensing and automated licence sweeps, define MPL-2.0 and CC-BY-SA-4.0 defaults, and permit AGPL-3.0-or-later for specified work.

Changes

Licensing policy constraints

Layer / File(s)	Summary
Update agent licensing constraints .machine_readable/6a2/AGENTIC.a2ml	The constraint now prohibits relicensing and automated licence sweeps. It defines licence defaults and AGPL-3.0-or-later exceptions.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Poem

A rabbit checks the licence line
No sweeping scripts cross the sign
MPL guides code through every door
CC-BY-SA guards prose lore
AGPL hops where rules allow

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