devx/docs/specs/DEVX-163.md

DEVX-163: Add vikunja-tasks skill and skill validation tests, fix create-task docs

Problem

The OBL-INFRA-548 programme audit found devx lacks a Vikunja task-lifecycle skill and has no skill validation tests (infra and sso-bridge have them; grm gained them under GRM-171). devx-workflow documents make create-task -- --title, which fails because devx-create-task forwards no arguments.

Approach

REQ-1: Add vikunja-tasks skill: create via module call, query, close, spec-collision convention, unreachable-tracker handling. REQ-2: Add tests/unit/test_skills_validation.py covering structure, make-target, file-ref checks + existence tests for all skills. REQ-3: Fix broken make create-task -- --title documentation in devx-workflow skill; add missing When to Invoke / Prerequisites sections to older-format skills.

Preserve the colliding spec as DEVX-163-run-push-stdout-historical.

Test Plan

• pytest tests/unit/test_skills_validation.py passes (10 tests).

Deploy Plan

Documentation/skills only — auto-merge to master; no runtime deploy.

Rollback Plan

Revert the squash-merge commit; skills are inert documentation.

Acceptance Criteria

• REQ-1: vikunja-tasks skill exists.
• REQ-2: tests/unit/test_skills_validation.py exists and passes.
• REQ-3: create-task docs corrected.

Out of Scope

• Fixing devx-create-task argument forwarding (S11 backlog: the devx.mak target takes no args; needs env-var or arg forwarding).