require-task-in-progress hook: session-dir task lookup misses tasks stored in `henry/` namespace

[henry-nsheaps]

Summary

The `require-task-in-progress` hook looks for in-progress tasks in the session-scoped directory (`$CLAUDE_DIR/tasks/$SESSION_ID/`), but Henry's tasks (created via `TaskCreate`/`TaskUpdate`) are stored in a different path: `$CLAUDE_DIR/tasks/henry/`. This mismatch causes the hook to always report `IN_PROGRESS_COUNT=0` for Henry, blocking all Edit/Write operations even when a legitimate task is in_progress.

Affected File

`plugins/claude-code/task-utils/hooks/require-task-in-progress.sh`

Root Cause

The hook constructs the task lookup path using `$CLAUDE_DIR/tasks/$SESSION_ID/` (e.g., `/.agents/henry/.claude/tasks/b44291fa-.../`). However, Henry's tasks are persisted under `/.agents/henry/.claude/tasks/henry/`. Because the hook looks in the session-ID subdirectory and finds nothing there, it concludes no task is in_progress and blocks the tool call.

Symptoms

• Every Edit and Write tool call is blocked by the hook, even when a task with status `in_progress` exists in Henry's task namespace.
• The hook logs `IN_PROGRESS_COUNT=0` regardless of actual task state.
• Henry cannot perform any file-editing work without the workaround described below.

Workaround

Manually write a JSON stub file to the session-scoped directory that mimics an in_progress task:

```bash
mkdir -p ~/.agents/henry/.claude/tasks/<SESSION_ID>/
echo '{"status":"in_progress","subject":"stub"}' > ~/.agents/henry/.claude/tasks/<SESSION_ID>/stub.json
```

This is fragile and must be repeated each session restart.

Proposed Fix

The hook should be updated to also search agent-namespaced task directories (e.g., `$CLAUDE_DIR/tasks/henry/`) in addition to (or instead of) the session-ID path. One approach:

1. Detect whether an agent-specific namespace directory exists (e.g., `$CLAUDE_DIR/tasks/henry/`).
2. If it does, scan that directory for tasks with `"status": "in_progress"`.
3. Fall back to the session-ID directory for non-namespaced agents.

Alternatively, expose a canonical environment variable (e.g., `$CLAUDE_TASK_DIR`) that each agent can set to point the hook at the correct task storage location.

Environment

• Agent: Henry (`nsheaps/.ai-agent-henry`)
• Hook: `plugins/claude-code/task-utils/hooks/require-task-in-progress.sh`
• Task storage path (actual): `~/.agents/henry/.claude/tasks/henry/`
• Task storage path (hook expects): `~/.agents/henry/.claude/tasks/<SESSION_ID>/`