dispatch

What this skill does

# Dispatch Infrastructure

This skill provides shared infrastructure for multi-model CLI dispatch. It is NOT user-invocable — it exists as reference material for the `adv-review` orchestrator agent and the `adv-*` commands.

## Available Engines

| Engine | CLI | Non-Interactive Flag | Sandbox Flag |
|---|---|---|---|
| codex | `codex exec` | `--full-auto` | `-s read-only` |
| gemini | `gemini` | `-p <prompt>` | `--sandbox --approval-mode plan` |
| claude | `claude` | `--print` | N/A (always sandboxed) |

## Scripts

### preflight.sh
**Path**: `${CLAUDE_PLUGIN_ROOT}/skills/dispatch/scripts/preflight.sh`

Combined pre-flight check: dependency verification, engine health checks, and scope resolution in a single call.

```bash
# Smart default (uncommitted changes > last commit > full repo)
bash preflight.sh

# Explicit scope modes
bash preflight.sh --commits abc123..def456
bash preflight.sh --since HEAD~5
bash preflight.sh --full
```

**Arguments**:
- `--commits <range>` — Review a specific commit range.
- `--since <ref>` — Review changes since a commit/ref.
- `--full` — Full repo file manifest.
- _(no flags)_ — Smart default: uncommitted changes > last commit > full repo.

**Output**: Single JSON object to stdout:
```json
{
  "deps": {"codex": true, "gemini": true, "claude": true, "jq": true},
  "engines": {
    "codex": {"available": true, "error_type": "none"},
    "gemini": {"available": true, "error_type": "none", "model": "gemini-2.5-pro"}
  },
  "scope": {
    "type": "working",
    "files_changed": 5,
    "diff_lines": 120,
    "untracked_files": 2,
    "content_file": ".claude/reviews/.tmp/scope-content.txt"
  }
}
```

**Scope types**: `working` (uncommitted changes), `commits` (commit range/since), `full` (file manifest).

Internally calls `dispatch.sh --health-check` for engine verification, including automatic Gemini flash fallback on quota errors.

### run-phase.sh
**Path**: `${CLAUDE_PLUGIN_ROOT}/skills/dispatch/scripts/run-phase.sh`

Parallel dispatch orchestrator for review and cross-examination phases. Handles dispatch, validation, and fallback in a single call.

```bash
# Review phase — dispatch 4 reviewers in parallel
bash run-phase.sh --phase review \
  --assignments "quality:codex,implementation:gemini,testing:codex,documentation:gemini" \
  --prompt-dir "$TMP" --output-dir "$TMP" --timeout 300

# Cross-exam phase — dispatch 2 engines in parallel
bash run-phase.sh --phase cross-exam --round 1 \
  --assignments "codex,gemini" \
  --prompt-dir "$TMP" --output-dir "$TMP" --timeout 300
```

**Arguments**:
- `--phase <review|cross-exam>` — Required. Phase type.
- `--assignments <spec>` — Required. Engine assignments.
  - Review: `"quality:codex,implementation:gemini,testing:codex,documentation:gemini"`
  - Cross-exam: `"codex,gemini"` (just engine names)
- `--prompt-dir <path>` — Directory containing prepared prompt files.
- `--output-dir <path>` — Directory for output files.
- `--timeout <seconds>` — Timeout per dispatch (default: 300).
- `--round <N>` — Cross-exam round number (required for cross-exam phase).
- `--gemini-model <model>` — Override Gemini model (e.g., `gemini-2.0-flash`).

**File naming conventions**:
- Review prompts: `prompt-<reviewer>.md` (e.g., `prompt-quality.md`)
- Review findings: `findings-<reviewer>.md` (e.g., `findings-quality.md`)
- Cross-exam prompts: `prompt-xr<N>.md` (e.g., `prompt-xr1.md`)
- Cross-exam results: `xr<N>-<engine>.md` (e.g., `xr1-codex.md`, `xr1-gemini.md`)

**Output**: JSON summary to stdout:
```json
{
  "phase": "review",
  "results": {
    "quality": {"engine": "codex", "status": "success", "fallback_used": false}
  },
  "success_count": 4,
  "failed": []
}
```

Cross-exam output also includes verdict counts:
```json
{
  "phase": "cross-exam",
  "round": 1,
  "verdicts": {"validate": 8, "dispute": 2, "amend": 1, "new_findings": 0}
}
```

**Fallback logic** (review phase only):
1. If Gemini dispatch fails with quota, retries with `gemini-2.0-flash`
2. If still failed, falls back to Claude
3. Final status reported in JSON output

### dispatch.sh
**Path**: `${CLAUDE_PLUGIN_ROOT}/skills/dispatch/scripts/dispatch.sh`

Core single-model CLI dispatcher. Called internally by `preflight.sh` and `run-phase.sh`, and directly by the `/adv-codex`, `/adv-gemini`, `/adv-gemini-research` commands.

```bash
# Basic dispatch
bash dispatch.sh --engine codex --prompt "Review this code" --cwd /path/to/repo

# With output file and prompt file
bash dispatch.sh --engine gemini --prompt-file /path/to/prompt.md --output-file /tmp/findings.md

# Research mode (Gemini only)
bash dispatch.sh --engine gemini --research --prompt "Latest TypeScript best practices"

# Check prerequisites
bash dispatch.sh --check-deps

# Health check
bash dispatch.sh --engine codex --health-check
```

**Arguments**:
- `--engine <codex|gemini|claude>` — Required. Target engine.
- `--prompt <string>` — The prompt text. Mutually exclusive with `--prompt-file`.
- `--prompt-file <path>` — Read prompt from a file.
- `--model <model>` — Override the default model for the engine.
- `--cwd <path>` — Working directory for the CLI (default: current dir).
- `--timeout <seconds>` — Max execution time (default: 300).
- `--output-file <path>` — Write response to this file.
- `--research` — Gemini only: enable grounded search.
- `--check-deps` — Check for required CLIs and exit with report.
- `--health-check` — Quick ping to verify engine is responsive (30s timeout, minimal prompt).

**Exit Codes** (classified by error type):
| Code | Meaning | Orchestrator Action |
|---|---|---|
| 0 | Success | Use response |
| 1 | General error | Log and fall back to Claude |
| 2 | Auth failure | Mark engine unavailable, fall back |
| 3 | Quota exhausted | Try model fallback (Gemini: `gemini-2.0-flash`), then fall back |
| 4 | Timeout | Mark engine unavailable, fall back |
| 5 | Empty/invalid response | Retry once, then fall back |

**Output Contract**:
- Response text (markdown) is written to `--output-file` if specified.
- On failure, the output file contains `DISPATCH_ERROR: engine=<e> exit_code=<n> duration_ms=<ms>` so the orchestrator can detect failures by reading the file.
- A JSON status line is printed to stdout: `{"engine":"codex","success":true,"output_file":"/path","duration_ms":12345,"exit_code":0,"error_type":"none","model":"default"}`
- Stderr is logged to `.claude/reviews/.tmp/dispatch.log`

**API Key Resolution** (Gemini):
1. Checks `GOOGLE_API_KEY` env var
2. Falls back to `GEMINI_API_KEY` env var
3. If neither set and `op` + `~/.env` available, wraps Gemini calls with `op run --env-file` to inject from 1Password

### scope.sh
**Path**: `${CLAUDE_PLUGIN_ROOT}/skills/dispatch/scripts/scope.sh`

Standalone git scope resolver. Used by the ad-hoc commands. The orchestrator uses `preflight.sh` instead (which includes scope resolution).

```bash
# Smart default (uncommitted changes > last commit > full repo)
bash scope.sh

# Explicit modes
bash scope.sh --commits abc123..def456
bash scope.sh --since HEAD~5
bash scope.sh --full
```

**Output**: JSON to stdout with scope type and artifact paths.

## Prompts

Reviewer prompt templates are in `${CLAUDE_PLUGIN_ROOT}/skills/dispatch/prompts/`:

| File | Reviewer | Engine |
|---|---|---|
| `reviewer-quality.md` | Code quality | Codex |
| `reviewer-implementation.md` | Implementation correctness | Gemini |
| `reviewer-testing.md` | Test coverage | Codex |
| `reviewer-simplification.md` | Simplification opportunities | Claude |
| `reviewer-documentation.md` | Documentation completeness | Gemini |
| `cross-examine.md` | Cross-examination template | All |
| `synthesize.md` | Final synthesis template | Orchestrator |

Each reviewer prompt contains a `{SCOPE_CONTENT}` placeholder that the orchestrator replaces with the actual scope content (diff or manifest) before dispatch.