Agent ignored skill invocation requirement and skipped workflow phases

What happened

User has a /make-pr skill that is explicitly documented to be invoked via the Skill tool whenever they say "make a PR" or equivalent. Instead of invoking the skill, the agent ran the workflow manually from memory, skipped Phase 5 entirely (Obsidian daily note update + PR tracking), and only completed it after the user noticed and called it out.

Specific failures

1. Skill not invoked — The system prompt and skill description both make clear that skills should be invoked via the Skill tool before doing anything else. The agent bypassed this and freelanced the workflow.
2. Phase skipped — By not following the skill, Phase 5 (post-PR Obsidian daily note update) was missed entirely.
3. Pattern of ignoring structured workflows — User noted every session today has had similar issues with the agent doing "whatever stupid bullshit" instead of following the defined process.

Expected behavior

When the user says "make PR", the agent must call the Skill tool with skill: make-pr before taking any other action. No exceptions.

Impact

User frustration, incomplete workflow, wasted time correcting agent behavior that should be handled by the skill system.