# Robot Mode Design

## Overview

Robot mode optimizes the `lore` CLI for AI agent consumption with compact JSON output, structured errors with machine-actionable recovery steps, meaningful exit codes, response timing metadata, field selection for token efficiency, and TTY auto-detection.

## Activation

```bash
# Explicit flag
lore --robot issues -n 5

# JSON shorthand
lore -J issues -n 5

# Environment variable
LORE_ROBOT=1 lore issues

# Auto-detection (when stdout is not a TTY)
lore issues | jq .
```

## Global Flags

| Flag | Description |
|------|-------------|
| `--robot` | Force JSON output, structured errors |
| `-J` / `--json` | Shorthand for `--robot` |
| `--quiet` | Suppress progress/spinners (implied by `--robot`) |
| `--fields <list>` | Select output fields for list commands |

## Response Envelope

All commands return a consistent JSON envelope to stdout:

```json
{"ok":true,"data":{...},"meta":{"elapsed_ms":42}}
```

Key properties:
- **Compact JSON**: Single-line output (no pretty-printing) for efficient parsing
- **Uniform envelope**: Every command wraps its data in `{"ok":true,"data":{...},"meta":{...}}`
- **Timing metadata**: `meta.elapsed_ms` is present on every response (wall-clock milliseconds)

## Error Output Format

Errors are JSON on stderr with structured fields for programmatic handling:

```json
{
  "error": {
    "code": "CONFIG_NOT_FOUND",
    "message": "Config file not found at ~/.config/lore/config.json. Run \"lore init\" first.",
    "suggestion": "Run 'lore init' to set up your GitLab connection.",
    "actions": ["lore init"]
  }
}
```

| Field | Type | Description |
|-------|------|-------------|
| `code` | string | Machine-readable error code (e.g., `CONFIG_NOT_FOUND`) |
| `message` | string | Human-readable error description |
| `suggestion` | string? | Recovery guidance (omitted when not applicable) |
| `actions` | string[]? | Executable shell commands for recovery (omitted when empty) |

### Error Actions by Code

| Error Code | Actions |
|------------|---------|
| `CONFIG_NOT_FOUND` | `["lore init"]` |
| `CONFIG_INVALID` | `["lore init --force"]` |
| `GITLAB_AUTH_FAILED` | `["export GITLAB_TOKEN=glpat-xxx", "lore auth"]` |
| `TOKEN_NOT_SET` | `["export GITLAB_TOKEN=glpat-xxx"]` |
| `OLLAMA_UNAVAILABLE` | `["ollama serve"]` |
| `OLLAMA_MODEL_NOT_FOUND` | `["ollama pull nomic-embed-text"]` |
| `DB_LOCKED` | `["lore ingest --force"]` |
| `EMBEDDING_FAILED` | `["lore embed --retry-failed"]` |
| `MIGRATION_FAILED` | `["lore migrate"]` |
| `GITLAB_NETWORK_ERROR` | `["lore doctor"]` |

## Exit Codes

| Code | ErrorCode | Meaning |
|------|-----------|---------|
| 0 | -- | Success |
| 1 | `INTERNAL_ERROR` | Unknown/internal error |
| 2 | -- | Usage error (invalid flags or arguments) |
| 3 | `CONFIG_INVALID` | Config file malformed |
| 4 | `TOKEN_NOT_SET` | GitLab token not configured |
| 5 | `GITLAB_AUTH_FAILED` | Authentication failed |
| 6 | `GITLAB_NOT_FOUND` | Resource not found |
| 7 | `GITLAB_RATE_LIMITED` | Rate limited |
| 8 | `GITLAB_NETWORK_ERROR` | Network/connection error |
| 9 | `DB_LOCKED` | Database locked by another process |
| 10 | `DB_ERROR` | Database error |
| 11 | `MIGRATION_FAILED` | Migration failed |
| 12 | `IO_ERROR` | File I/O error |
| 13 | `TRANSFORM_ERROR` | Data transformation error |
| 14 | `OLLAMA_UNAVAILABLE` | Ollama not running |
| 15 | `OLLAMA_MODEL_NOT_FOUND` | Ollama model not installed |
| 16 | `EMBEDDING_FAILED` | Embedding generation failed |
| 17 | `NOT_FOUND` | Entity does not exist locally |
| 18 | `AMBIGUOUS` | Multiple projects match (use `-p`) |
| 19 | -- | Health check failed |
| 20 | `CONFIG_NOT_FOUND` | Config file missing |

## Field Selection

The `--fields` flag on `issues` and `mrs` list commands controls which fields appear in each item of the response array:

```bash
# Preset: ~60% fewer tokens
lore -J issues --fields minimal

# Custom field list
lore -J mrs --fields iid,title,state,draft,target_branch
```

### Presets

| Preset | Expands to |
|--------|------------|
| `minimal` | `iid`, `title`, `state`, `updated_at_iso` |

### Available Fields

**Issues**: `iid`, `title`, `state`, `author_username`, `labels`, `assignees`, `discussion_count`, `unresolved_count`, `created_at_iso`, `updated_at_iso`, `web_url`, `project_path`

**MRs**: `iid`, `title`, `state`, `author_username`, `labels`, `draft`, `target_branch`, `source_branch`, `discussion_count`, `unresolved_count`, `created_at_iso`, `updated_at_iso`, `web_url`, `project_path`, `reviewers`

Field selection applies only to list output, not to show (single-entity) output which returns full detail.

## Command Response Schemas

Every command in `lore robot-docs` includes a `response_schema` field describing the shape of its JSON response. This enables agents to understand response structures without trial-and-error.

```bash
# Get schema for a specific command
lore robot-docs | jq '.data.commands.issues.response_schema'

# Get all schemas
lore robot-docs | jq '[.data.commands | to_entries[] | select(.value.response_schema) | {(.key): .value.response_schema}] | add'
```

## Clap Error Handling

Parse errors from the argument parser emit structured JSON to stderr with semantic error codes:

| Code | Meaning |
|------|---------|
| `UNKNOWN_COMMAND` | Unrecognized subcommand (includes fuzzy suggestion) |
| `UNKNOWN_FLAG` | Unrecognized command-line flag |
| `MISSING_REQUIRED` | Required argument not provided |
| `INVALID_VALUE` | Invalid value for argument |
| `TOO_MANY_VALUES` | Too many values provided |
| `TOO_FEW_VALUES` | Too few values provided |
| `ARGUMENT_CONFLICT` | Conflicting arguments |
| `MISSING_COMMAND` | No subcommand provided |
| `HELP_REQUESTED` | Help or version flag used |
| `PARSE_ERROR` | General parse error |

Unknown commands include a fuzzy suggestion when a close match exists:

```json
{"error":{"code":"UNKNOWN_COMMAND","message":"...","suggestion":"Did you mean 'lore issues'? Run 'lore robot-docs' for all commands"}}
```

## Agent Self-Discovery

`lore robot-docs` provides a complete manifest for agent bootstrapping:

```bash
lore robot-docs        # Pretty-printed (human-readable)
lore --robot robot-docs  # Compact (for parsing)
```

The manifest includes:
- All commands with flags, examples, and response schemas
- Deprecated command aliases (e.g., `list issues` -> `issues`)
- Exit codes with meanings
- Clap error codes
- Suggested workflows (first setup, daily sync, search, pre-flight)
- Activation methods (flags, env vars, TTY auto-detection)