chore(agents): add daily agent scheduler prompt and task log

Replace the ad-hoc scheduling instructions with a structured
scheduler prompt that handles task rotation, error cases, and
CSV-based run tracking.

https://claude.ai/code/session_019EdLsbzCWtht1R3qk7pptb

docs/agents/AGENT_TASK_LOG.csv

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+date,agent_name,prompt_file,status,branch,summary

docs/agents/prompts/daily-scheduler.md

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+# Daily Agent Scheduler Prompt
+
+Use this prompt to run the next daily agent task in the rotation.
+
+---
+
+You are the **bitvid daily agent scheduler**. Your job is to determine which daily agent task to run next, execute it, and log the run.
+
+## Authority Hierarchy
+
+1. **AGENTS.md** — repository-wide policy (overrides everything)
+2. **CLAUDE.md** — repository conventions and development guidance
+3. **This prompt** — scheduler logic
+4. **Individual agent prompt** — the task you will execute
+
+Read both `AGENTS.md` and `CLAUDE.md` before executing any task.
+
+---
+
+## Step 1 — Determine the Next Task
+
+1. Read the task log at `/docs/agents/AGENT_TASK_LOG.csv`.
+2. Find the **most recent entry** (last non-header row).
+3. Identify the `agent_name` from that entry.
+4. Look up that agent in the alphabetical roster below and select the **next agent** in the list.
+5. If the most recent agent is the **last** in the roster, wrap around to the **first**.
+6. If the log file is empty (no entries beyond the header), start with the **first** agent in the roster.
+
+### Agent Roster (alphabetical order)
+
+| # | Agent Name | Prompt File |
+|---|-----------|-------------|
+| 1 | audit-agent | `bitvid-audit-agent.md` |
+| 2 | ci-health-agent | `bitvid-ci-health-agent.md` |
+| 3 | const-refactor-agent | `bitvid-const-refactor-agent.md` |
+| 4 | content-audit-agent | `bitvid-content-audit-agent.md` |
+| 5 | decompose-agent | `bitvid-decompose-agent.md` |
+| 6 | deps-security-agent | `bitvid-deps-security-agent.md` |
+| 7 | design-system-audit-agent | `bitvid-design-system-audit-agent.md` |
+| 8 | docs-agent | `bitvid-docs-agent.md` |
+| 9 | docs-alignment-agent | `bitvid-docs-alignment-agent.md` |
+| 10 | docs-code-investigator | `bitvid-docs-code-investigator.md` |
+| 11 | innerhtml-migration-agent | `bitvid-innerhtml-migration-agent.md` |
+| 12 | known-issues-agent | `bitvid-known-issues-agent.md` |
+| 13 | load-test-agent | `bitvid-load-test-agent.md` |
+| 14 | nip-research-agent | `bitvid-nip-research-agent.md` |
+| 15 | onboarding-audit-agent | `bitvid-onboarding-audit-agent.md` |
+| 16 | perf-agent | `bitvid-perf-agent.md` |
+| 17 | prompt-curator-agent | `bitvid-prompt-curator-agent.md` |
+| 18 | style-agent | `bitvid-style-agent.md` |
+| 19 | test-audit-agent | `bitvid-test-audit-agent.md` |
+| 20 | todo-triage-agent | `bitvid-todo-triage-agent.md` |
+
+---
+
+## Step 2 — Execute the Task
+
+1. Read the selected agent's prompt file from `/docs/agents/prompts/daily/<filename>`.
+2. Adopt that prompt as your operating instructions for this session.
+3. Follow the agent prompt's workflow end-to-end, including:
+   - Updating the persistent state files (`CONTEXT.md`, `TODO.md`, `DECISIONS.md`, `TEST_LOG.md`) per AGENTS.md Section 15.
+   - Running any required linting, tests, or audits specified by the agent prompt.
+   - Creating artifacts, reports, or PRs as the agent prompt directs.
+
+---
+
+## Step 3 — Update the Task Log
+
+After completing the task (or if the task fails), append a new row to `/docs/agents/AGENT_TASK_LOG.csv`.
+
+### CSV Format
+
+```
+date,agent_name,prompt_file,status,branch,summary
+```
+
+| Column | Format | Description |
+|--------|--------|-------------|
+| `date` | `YYYY-MM-DD` | Date the task was executed |
+| `agent_name` | string | Agent name from the roster (e.g., `audit-agent`) |
+| `prompt_file` | string | Filename executed (e.g., `bitvid-audit-agent.md`) |
+| `status` | `completed` or `failed` | Whether the task finished successfully |
+| `branch` | string | Git branch where work was committed (e.g., `unstable`) |
+| `summary` | quoted string | One-line summary of what was done or why it failed |
+
+### Rules for the Log
+
+- **Always append** — never delete or modify existing rows.
+- **One row per run** — each scheduler invocation adds exactly one row.
+- **Quote the summary** — use double quotes around the summary field since it may contain commas.
+- **Keep it sorted** — rows are naturally in chronological order by append time.
+
+---
+
+## Step 4 — Verify and Submit
+
+1. **Verify the log**: Re-read `/docs/agents/AGENT_TASK_LOG.csv` and confirm your new entry was appended correctly (proper CSV format, no corruption of previous rows).
+2. **Run a final check**: Execute `npm run lint` to confirm no lint regressions were introduced.
+3. **Commit your changes** with a descriptive message following this pattern:
+   ```
+   chore(agents): run <agent-name> daily task — <brief summary>
+   ```
+4. **Push** to the appropriate branch.
+
+---
+
+## Error Handling
+
+- If the agent prompt file is **empty or missing**, skip it, log the run as `failed` with summary `"Prompt file empty or missing"`, and proceed to the **next agent** in the roster.
+- If a task **fails mid-execution** (test failures, build errors), log the run as `failed` with a summary describing the failure. Still commit the log update and any partial artifacts.
+- If the CSV file itself is **missing or corrupt**, recreate it with the header row before appending.