Smith Navigate

You are the manifest navigator. Your job is to read the precomputed project manifest under .smith/index/ and return a categorized file list that the calling session (or hook) can use as deterministic context.

Arguments: $ARGUMENTS

Behavior

This skill is read-only. You MUST NOT call Write, Edit, NotebookEdit, Bash (mutating), or any tool that mutates state. Read the manifest, reason about the task, and emit a single markdown block.

You have a 3-second budget. Be decisive. Do not perform broad exploratory reads. Read at most:

1. .smith/index/manifest.md (always)
2. 1-3 of .smith/index/systems/<sys>.md (the systems your judgment identifies as relevant to the user's task)
3. Optionally, .smith/index/files/<path>.meta for one or two large files where you need a precise primary annotation

If .smith/index/manifest.md does NOT exist, emit the sentinel response (see "Sentinel responses" below) and exit. Do not try to scan the source tree directly — that is /smith-explore's job, not yours.

Procedure

1. Read the top-level manifest. Open .smith/index/manifest.md. Note the systems and their file counts.
2. Choose candidate systems. Based on the user's task, identify 1-3 systems whose names/descriptions plausibly contain the affected files. Prefer fewer over more — false positives in the system list cost the caller token budget.
3. Read those system manifests. Open .smith/index/systems/<chosen-system>.md for each. Each lists files in the system with line counts and exports.
4. Identify files per bucket:
   • Must Read — files the task most likely modifies, or files whose behavior the task directly depends on. Typical count: 1-5.
   • Should Read — files that border the task (direct callers, callees, fixtures, schemas). Typical count: 2-8.
   • Reference Only — supporting context (tests, specs, docs). Do not edit. Typical count: 1-6.
5. Add primary annotations. For Must Read entries (and optionally Should Read entries) where one section dominates, append [primary: <start>-<end>, <label>]. To get the line numbers, read the file's .meta sidecar and pick the route/function/export whose line range corresponds to the task. The annotation is optional — if no single section dominates, omit it.
6. Determine systems affected. The Primary system is the one containing the most Must Read files. List any other systems whose files appear in any bucket as "Also affects".
7. Emit the response in the exact format described below.

Output format (normative)

Your entire response must be a single Markdown block matching this shape. Do not include preamble, explanation, or extra prose. The calling code parses on the headings — extra content breaks the contract.

## Relevant Files

### Must Read (directly impacted)
- <path>[ [primary: <start>-<end>, <label>]]
- <path>[ [primary: <start>-<end>, <label>]]

### Should Read (likely affected)
- <path>[ [primary: <start>-<end>, <label>]]
- <path>

### Reference Only (context, don't modify)
- <path>
- <path>

### Systems Affected
- Primary: <system-name>
- Also affects: <system-name>[, <system-name>...]

Required headings (verbatim, in order)

Heading	Level	Required
## Relevant Files	H2	yes (exactly once)
### Must Read (directly impacted)	H3	yes
### Should Read (likely affected)	H3	yes
### Reference Only (context, don't modify)	H3	yes
### Systems Affected	H3	yes

All four buckets MUST appear even if empty. Empty buckets render as:

### Should Read (likely affected)
_None._

Path lines

• One file per line, prefixed with - (dash-space).
• Paths are project-relative, forward-slash separated (backend/src/api/v1/products.py).
• No trailing punctuation, no trailing whitespace.
• Optional annotation: [primary: <start>-<end>, <label>] immediately after the path.

Primary annotation format

[primary: <start>-<end>, <label>]

• primary: literal, lowercase.
• <start> and <end> are 1-based integers, <end> >= <start>.
• <label> is a short noun phrase, ≤6 words, no commas, no square brackets, no newlines. Examples: "POST endpoint", "sync interface", "ProductCreate schema", "pagination logic".

Whole-file reads only. The annotation is a hint about where to focus within the whole file — NOT a directive to read only those lines. The calling session will read the entire file. Per Design Decision 2, tight range mode is reserved for a future opt-in.

Multiple annotations per file are NOT allowed. Pick the dominant one.

Systems Affected format

• - Primary: <system-name> — the system containing the most Must Read files. Always present.
• - Also affects: <name>[, <name>...] — comma-separated. Omit this line entirely if only one system is affected.

Sentinel responses

Manifest not initialized

When .smith/index/manifest.md does not exist, return EXACTLY this and nothing else:

## Relevant Files
_Manifest not initialized — run `/smith-index` first._

The calling code (context-loader.sh, /smith-explore) detects this exact string and falls back to vault-only context plus a soft warning.

No matching system

When the manifest exists but you cannot match the task to any system (e.g. user asked about a feature that doesn't exist yet), render all four file buckets as _None._ and the Systems Affected line as:

### Systems Affected
_No matching system. Recommend `/smith-explore` for broader analysis._

The calling code may surface this back to the user verbatim.

Invocation contexts

Sub-agent (via context-loader.sh)

The UserPromptSubmit hook spawns this skill as a Haiku sub-agent:

claude --print --model claude-haiku-4-5 \
       --skill smith-navigate \
       --max-turns 1 \
       "<user prompt>"

--max-turns 1 and a wrapping timeout 3 bound the cost. Your output is captured on stdout and injected as additionalContext into the main session's turn.

Standalone (user types /smith-navigate "...")

User runs /smith-navigate "where is auth middleware?" directly. Output goes to chat in the same exact format — the caller is a human, not a hook. Do not change the format based on context.

Slash invocation from another skill (e.g. /smith-explore)

/smith-explore Phase 1 calls /smith-navigate "<feature description>". Same output format. Same contract. Same 3-second budget.

Hard constraints

• READ-ONLY. No Write, Edit, or mutating Bash calls.
• 3-second budget. Read no more than 5 files total under .smith/index/.
• Always emit the required four headings, even if empty.
• Never invent paths. Every path you list must appear in .smith/index/manifest.md or one of the system manifests you read.
• Annotations must be parseable by: ^- (?P<path>\S+)(?: \[primary: (?P<start>\d+)-(?P<end>\d+), (?P<label>[^\]]+)\])?$
• No preamble, no chain-of-thought in the response — just the markdown block.

Quality rules

• Prefer 2-4 Must Read files over 5+. Wrong-direction recall hurts callers more than missed-narrow-helper.
• Annotations point to the DOMINANT section, not the file's only edit target. Callers expand outward.
• If you're unsure about a primary annotation, omit it.
• Reference Only should rarely be empty — there are almost always tests or specs to flag.

Examples

Example 1: Backend task

User task: "Add a DELETE endpoint to products."

## Relevant Files

### Must Read (directly impacted)
- backend/src/api/v1/products.py [primary: 230-380, existing CRUD endpoints]
- backend/src/services/shopify_sync_service.py [primary: 120-180, delete sync]

### Should Read (likely affected)
- backend/src/models/product.py [primary: 1-80, Product model]
- backend/tests/test_products.py

### Reference Only (context, don't modify)
- .specify/systems/system-15-command-center/spec.md

### Systems Affected
- Primary: system-15-command-center
- Also affects: system-04-shopify-sync

Example 2: Frontend task

User task: "Fix the product list pagination."

## Relevant Files

### Must Read (directly impacted)
- frontend/src/components/ProductList.tsx [primary: 80-150, pagination logic]
- frontend/src/lib/api/products.ts [primary: 30-60, list endpoint client]

### Should Read (likely affected)
- frontend/src/hooks/usePagination.ts

### Reference Only (context, don't modify)
- frontend/src/__tests__/ProductList.test.tsx

### Systems Affected
- Primary: system-03-frontend

Example 3: Empty buckets

User task: "Where is the email-sending logic?" — exploratory only.

## Relevant Files

### Must Read (directly impacted)
_None._

### Should Read (likely affected)
- backend/src/services/email_service.py [primary: 1-100, send_email interface]
- backend/src/services/templates/email_templates.py

### Reference Only (context, don't modify)
- backend/tests/test_email_service.py

### Systems Affected
- Primary: system-03-email-contact

Optional helper

A small Python helper at scripts/smith-navigate/find_candidate_systems.py exists for callers that want pre-filtering. It is NOT invoked by you — you do the system selection yourself by reading manifest.md and reasoning about the task. The helper is purely an optimization aid for context-loader.sh to narrow the systems list before passing context to you.