feat: register team-discover hooks + add Skill Check step to preset commands

[kanfil]

Summary

The team-ai-directives extension declared no hooks in its extension.yml, so register_hooks() wrote nothing for before_specify/before_plan. The team.discover.md command documented these hooks but the manifest never declared them — leaving personas, rules, examples, and team skills undiscovered during /spec.specify and /spec.plan.

This was found by reviewing a session trace of /spec.constitution and /spec.specify where team skills were never triggered despite the AGENTS.md injection being present.

Changes

Part 1: Register team-discover hooks (extensions/team-ai-directives/extension.yml)

• Added hooks: block with mandatory before_specify + before_plan hooks (optional: false) pointing at adlc.team-ai-directives.discover.
• On install/update, register_hooks(manifest) now writes these to .specify/extensions.yml, so the spec workflow's existing pre-execution hook checks auto-invoke /team.discover.
• Bumped extension version to 4.2.0.

Part 2: Add generic Skill Check step to 11 preset command files

• All preset commands in agentic-sdlc (9 adlc.spec.* + adlc.spec.specify) and agentic-quick (adlc.quick.implement) now include a generic "Skill Check" step before the extension hook checks.
• This bridges the ambient AGENTS.md "Strict Compliance" directive into the command's procedural flow, preventing the "STOP. execute extension hooks" tunnel from overriding it.
• Fully generic — does not name any specific skill.

Part 3: Strengthen AGENTS.md injection text

• update-agent-context.sh / .ps1 / .py: strengthened "Strict Compliance" bullet with "This is not optional and applies to every interaction."

Part 4: Tests, CHANGELOGs, version bump

• test_team_ai_directives_declares_hooks: verifies manifest declares both hooks with correct command and optional: false.
• Root CHANGELOG: 0.12.15+adlc3 entry.
• extensions/team-ai-directives/CHANGELOG.md: 4.2.0 entry.
• pyproject.toml: version bump to 0.12.15+adlc3.

Test plan

• test_team_ai_directives_declares_hooks passes
• 425 tests pass (test_bundled_extension_hooks.py + test_extensions.py + test_extension_registration.py + test_agent_config_consistency.py)
• Manual: run specify extension update team-ai-directives in a workspace with team-ai-directives installed, verify before_specify and before_plan hooks appear in .specify/extensions.yml

Migration

Existing workspaces: run specify extension update team-ai-directives to populate the new before_specify / before_plan hooks in .specify/extensions.yml.

Assisted-by: opencode (model: glm-5.2, supervised)