Deep Dive

Deep Dive Audit Protocol

Read-only deep audit of a specified codebase scope using parallel explorer waves, always 2 parallel reviewers, and sequential critic challenge. This mode does NOT mutate source code, does NOT delegate to coder, and does NOT call declare_scope.

Graph-first evidence contract

Use repo_map graph_health and boundary discovery before a targeted source-bearing context_pack; existing ask, key_files, and localization remain discovery inputs, and repo_map action="retrieve" adds one bounded mixed pass routing across ask, symbols, callers, impact, routes, data, preflight, tests, diffs, and explanations — it does not replace explicit key_files or localization discovery. Graph evidence is advisory only. If freshness is stale or inconclusive, confidence is low, source is missing, the language is unsupported/dynamic, the graph is absent, or an action fails, inspect the direct source and searches before reporting a finding.

MODE: DEEP_DIVE

Step 0 — Parse Header

Parse the MODE: DEEP_DIVE header to extract:

• scope: the codebase area to audit (e.g., "auth", "payment flow", "src/hooks/")
• profile: one of standard | security | ux | architecture | full (default: standard)
• max_explorers: integer 1..8 — upper bound on explorer waves (default: 6, or 8 for full profile). This is a CAP, not a fixed count: scale the actual wave size to the resolved scope surface — a trivial scope needs 1–2 explorers, a typical scope 3–5, a large multi-module scope up to the cap — never fix the count in advance.
• output: markdown | json (default: markdown)
• update_main: boolean (default: true) — whether to fetch/ff-only main before starting
• allow_dirty: boolean (default: false) — whether to proceed with uncommitted changes

If the header is malformed or missing required fields, report the error and stop.

Step 1 — Repo Readiness

1. Check git working tree status. If dirty and allow_dirty is false, warn the user and ask whether to proceed. Do NOT proceed automatically.
2. If update_main is true and tree is clean: check current branch. If not on main, report current branch to user and ASK FOR CONFIRMATION before switching. Only after explicit user approval: git fetch origin main && git checkout main && git merge --ff-only origin/main. If ff-only fails, warn the user and ask before proceeding.
3. Record the current HEAD commit hash for the report.

Step 2 — Scope Resolution

Use the following tools to map the audit scope:

1. repo_map with action "graph_health" — only if the graph is missing or incomplete (stale beyond the refresh cap, extraction failures) run repo_map with action "build"; plugin init and the session-start probe keep the graph fresh otherwise
2. repo_map with action "ask" (the audit scope as the question) and action "key_files" to rank scope-relevant files and repo hubs before any manual symbol walk
3. repo_map with action "localization" for the scope target
4. symbols and batch_symbols on key files identified by ask or localization
5. imports to trace dependency boundaries
6. doc_scan if documentation coverage is relevant
7. knowledge_recall with query matching the scope domain

Produce a SCOPE MAP: list of files, modules, and interfaces within the audit boundary. Cap at 50 files total.

Step 3 — Explorer Missions (Parallel Waves)

Dispatch explorer waves with dispatch_lanes_async when available. Each wave contains up to max_explorers missions. Before the first dispatch, verify from the session's actual tool list whether the controller's lane tools are present; when they are absent, use the native parallel subagent path from the start rather than discovering the gap on first failure.

File caps per mission:

• 8 files maximum per mission
• ~3500 total lines across all files in a mission
• Group files by import proximity (files that import each other go in the same mission)

Partition is the contract: missions own non-overlapping file sets — no file appears in two missions — and the union of all missions must cover every file in the Step 2 scope map. Any scope-map file not assigned to a mission is an explicit coverage gap, not an optional skip.

Profile-based lane selection — each profile activates specific lanes:

Each explorer mission receives:

• Lane template name and description
• Assigned files (8 max, grouped by import proximity)
• The scope map context from Step 2
• Instruction: "You are performing a [LANE] audit. Report ALL findings as pipe-delimited [CANDIDATE] rows. Header row first, then one row per finding:

[CANDIDATE] | candidate_id | lane | severity | category | file:line | claim | evidence_summary | impact_context | confidence

• candidate_id: unique within this lane (e.g. C-001, C-002)
• severity: INFO | LOW | MEDIUM | HIGH | CRITICAL
• confidence: LOW | MEDIUM | HIGH
• If you find zero issues, emit the header row with no data rows.
• Do NOT emit findings as prose or free text — the downstream parser requires pipe-delimited rows."

Explorer missions are dispatched in parallel waves. Launch the wave promptly — do not accumulate extensive planning prose before the call, or output truncation may swallow the tool call itself. Launch the wave, record the returned batch_id, then continue deterministic architect work that does not depend on lane output: refine the scope map, build the candidate ledger shell, inspect local evidence with read-only tools, and prepare reviewer shard structure. Do not synthesize findings from running lanes. Keep each lane prompt compact: send shared context ONCE via the common_prompt field, or have lanes read it from a file by absolute path, instead of inlining the same large blob into every lane prompt — oversized inline prompts produce malformed or truncated tool-call JSON.

Incremental collection pattern: While lanes are running, use collect_lane_results without wait (or wait: false) to poll progress. Process any settled lanes immediately — extract candidates, check output_ref, update the candidate ledger — while continuing independent architect work (scope refinement, local evidence reads, reviewer preparation) between polls. This avoids idle waiting and lets you pipeline candidate normalization with lane completion. Only use wait: true at the Step 4 boundary if lanes are still pending and no more independent work remains.

At the Step 4 boundary, all lanes must be settled before proceeding. If non-blocking polls show lanes still running and you have exhausted independent work, call collect_lane_results with wait: true to block on the remaining lanes. COVERAGE GATE: Every lane must produce validated candidate output before proceeding. Missing, stale, cancelled, or failed lanes are coverage gaps that must be closed — not documented and skipped. If a lane fails: (1) retry max 2 times with materially different parameters; (2) if retries fail, deploy an equivalent alternative (same agent type, same prompt, same scope, same isolation — different dispatch mechanism acceptable when verified, including Task-tool dispatch as the final fallback when lane tools do not work); (3) if no equivalent exists, stop and surface the lane failure to the user as BLOCKED. Do not proceed past a required lane with unclosed coverage or produce a degraded review.

When a collected or blocking lane result includes output_ref, treat output as a preview and call retrieve_lane_output before extracting candidate findings or declaring a lane clean. If the result is output_degraded, transcript_incomplete, truncated without a usable ref, missing, stale, cancelled, or failed — or if the lane reports status: completed but parse_lane_candidates returns 0 candidates (Mode B: intermediate reasoning only) — apply the COVERAGE GATE: retry, deploy equivalent including Task-tool dispatch as the final fallback when lane tools do not work, or stop and surface the lane failure to the user as BLOCKED. Do not mark findings/coverage UNVERIFIED to proceed past the gap.

Explorers generate CANDIDATE FINDINGS only — they do NOT make verdicts. All findings are unverified until Step 5.