Structure implementation plan messages

[efraespada]

Introduces a structured implementation-plan contract with bounded steps and acceptance criteria. Plans now render consistently, support locale-aware replay and migration, and prevent malformed or mixed-language content from being published.

What changed

• Added a validated implementation-plan model requiring three to eight ordered steps, up to two details per step, and one bounded acceptance criterion.
• Updated agent responses, prompts, fingerprints, persistence, and publication rendering to use structured plans instead of arbitrary Markdown.
• Added locale-aware replay and migration behavior, including fail-closed handling for missing, mismatched, or invalid plan state.
• Documented the new plan format, localization rules, idempotent updates, and legacy-plan compatibility, with focused contract and workflow tests.

Review notes

• Legacy free-form plans remain readable, but require an agent-backed structured replacement during the next configured planning run.
• Changing the effective issue locale requires a complete localized replacement; unchanged responses are rejected until the stored plan locale matches.

[docs-page]

To preview the documentation for this pull request, visit the following URL:

docs.page/vypdev/copilot~389

Documentation is deployed and generated using docs.page

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.06%. Comparing base (274db40) to head (52ffde3).
⚠️ Report is 779 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #389      +/-   ##
===========================================
+ Coverage    90.94%   93.06%   +2.12%     
===========================================
  Files          135      657     +522     
  Lines         6251    17572   +11321     
  Branches      1338     4534    +3196     
===========================================
+ Hits          5685    16354   +10669     
- Misses         172      471     +299     
- Partials       394      747     +353     

Files with missing lines	Coverage Δ
src/actions/github_action_completion.ts	95.90% <100.00%> (ø)
src/application/policies/agent_response_schemas.ts	100.00% <ø> (ø)
...pplication/policies/publication_message_catalog.ts	100.00% <ø> (ø)
...ion/policies/semantic_result_publication_policy.ts	98.26% <100.00%> (ø)
.../usecases/actions/recommend_steps_result_policy.ts	100.00% <100.00%> (ø)
...ation/usecases/actions/recommend_steps_workflow.ts	98.11% <100.00%> (ø)
...pplication/usecases/push_single_action_contexts.ts	98.96% <100.00%> (ø)
src/data/model/config.ts	92.85% <100.00%> (-7.15%)	⬇️
src/data/model/recommendation_state.ts	100.00% <100.00%> (ø)
src/domain/implementation_plan.ts	100.00% <100.00%> (ø)
... and 1 more

... and 708 files with indirect coverage changes

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[vypbot]

Bugbot: review incomplete

Current status: The review of 52ffde3 has partial coverage and cannot declare the whole pull request clean.

Action: Inspect the omitted items or reduce the pull request scope. Rerun the review only after changing the scope, limits, or access.

Incomplete coverage

• selection: complete; retained=1
• pull-request-comments: complete; retained=1
• review-threads: complete; retained=1
• diff: partial; retained=19, omitted=10, truncated=1
• previous-findings: complete; retained=1
• human-conversation: complete; retained=0
• rules: complete; retained=0

Pull request · Verified commit · Workflow run

[vypbot]

Current status: Overall coverage is partial; this snapshot does not prove that all of its findings are resolved.
Last reconciled on 52ffde3. See aggregate Bugbot status.

🤖 Bugbot review snapshot

Bugbot reported 1 potential problem when commit 8b8fa00 was analyzed. This snapshot is historical; use the status block above for current state. 1 finding is linked to changed code.

Findings

• medium: Locale changes replay plan content in the previous locale — src/application/usecases/actions/recommend_steps_workflow.ts:60