Use Claude Code task system for step tracking

[mickeylorenzini]

Description

Implement Claude Code's task system (TaskCreate/TaskUpdate/TaskList) in the harden skill to track audit steps and progress, similar to how the brainstorming skill uses it. Currently harden runs its multi-step process (Research → Audit Pass A → Audit Pass B → Fix → Convergence check) without visible progress tracking.

The task system provides a persistent checklist UI that shows pending/in-progress/completed status for each step. This gives the user visibility into where the audit is in its process.

Example

When harden runs, the task list should show:

• Research domain best practices
• Pass A — Thematic audit
• Pass B — Structural audit
• Pass C — Regression check (if applicable)
• Fix critical and significant issues
• Convergence check
• (Additional passes if needed)

Likely Affected Files/Modules

• SKILL.md — add instructions to create tasks for each audit step and update status as they complete

Acceptance Criteria

• Running harden creates a task list with one task per audit step
• Each task updates to in_progress when starting and completed when done
• Task list is visible to the user throughout the harden process
• Multi-pass convergence creates additional task entries for subsequent passes
• No regression in existing harden audit functionality

[mickeylorenzini]

Note: Task System UI Coexistence

The Claude Code task system is a single flat list per conversation — there's no namespacing or grouping by skill. If another skill (e.g., brainstorming or wrap) has already created tasks in the same session, calling TaskCreate from harden will add to the same list, not overwrite or create a separate UI.

Risk: Not a crash, but a readability problem — the user sees all tasks from all skills jumbled together. The most realistic collision is brainstorming → harden in the same session.

Mitigation: Prefix task subjects with the skill name, e.g.:

• [harden] Pass A — Thematic audit
• [harden] Fix critical and significant issues

This keeps tasks visually distinguishable if another skill's tasks are already present.