shipment-reconcile

name	shipment-reconcile
description	GI/GR reconciliation gate for shipment manifests — verifies every manifest item exists in queue (pre-mode) or archive (post-mode) with the expected status before or after backlogit_ship_shipment runs.

Shipment Reconcile

Provides a double-entry (GI/GR) integrity check for shipment manifests. Run mode: pre before calling backlogit_ship_shipment and mode: post after the archive + restore steps complete.

When to Use

• Ship Step 6 (mandatory): pre-mode immediately before backlogit_ship_shipment; post-mode immediately after the git restore .backlogit/archive/ step.
• Ship Step 0.5 (sanity check): pre-mode at intake with expected_status: queued (or active if the shipment was already claimed in a prior session) to catch Stage-side over-inclusion before any build work begins.
• Ad-hoc audit: any time an operator suspects manifest drift.

Inputs

Parameter	Required	Values	Notes
mode	yes	pre | post	Controls which check phase runs
shipment_id	yes	e.g. 004-shipment	The shipment to reconcile
expected_status	pre-mode only	queued | active | done	queued for fresh intake; active when shipment already claimed in a prior session; done for pre-ship check
merge_commit_sha	post-mode only	git SHA	The merge commit that closed the PR

Output

A structured reconciliation report stored at .backlogit/reconcile/{shipment_id}-{mode}-{timestamp}.md.

Every item in the manifest is classified as one of:

Classification	Pre-Mode Meaning	Post-Mode Meaning
matched	Queue file present AND declared status matches expected_status	Archive file present for this item
pre-archived	No queue file found but archive file exists — item already archived before this shipment ran; treated as valid	N/A (all items are expected in archive; use matched / missing)
missing	No queue or archive file found for this manifest item	Archive file not found for this manifest item
status-mismatch	Queue file present but declared status does not match expected_status	N/A (post-mode does not check status fields)
orphan	Queue file declares this shipment_id in its frontmatter but is NOT in the manifest	N/A (post-mode does not scan queue files)

Classification semantics are mode-dependent. Pre-mode checks the queue for status correctness; post-mode checks the archive for file presence only.

The report ends with a recommendation:

• PROCEED — all items are matched or pre-archived; no action needed
• HALT — operator reconcile required — one or more missing, status-mismatch, or orphan items

Behavioral Constraints

• Report-and-halt only. This skill NEVER modifies the shipment manifest, queue files, or archive contents. Operator must manually reconcile via existing backlog tools and re-invoke Ship Step 6.
• No prune mode in v1. Auto-mutation of the manifest is reserved for a future version after upstream backlog tool validation surface is confirmed.
• Single-writer lock. When invoked from Ship Step 6, this skill holds the .backlogit/queue/{shipment_id}.md file lock (via the file-lock skill) for the duration of pre-mode → post-mode. See lock protocol in the Required Protocol section below.
• Halt on RECONCILE_FAIL. Do not proceed to backlogit_ship_shipment unless pre-mode returns PROCEED. Surface the report path to the operator.

Required Protocol

Pre-Mode

1. Acquire single-writer lock (Ship Step 6 invocations only, not intake): Invoke the file-lock skill to acquire .backlogit/queue/{shipment_id}.md. If lock acquisition fails, count as a session stall (circuit-breaker protocol) and prompt the operator.

2. Load manifest via backlogit_get_shipment(shipment_id). Extract the items list.

3. Check each manifest item:

   • Attempt to locate the file at .backlogit/queue/{id}.*
   • If found, read its frontmatter and compare status to expected_status — classify as matched or status-mismatch
   • If NOT found in queue, check .backlogit/archive/{id}.* — if archive file exists, classify as pre-archived (valid; item already shipped) — if no file in either location, classify as missing

4. Orphan scan: Scan .backlogit/queue/ for any files whose YAML frontmatter declares shipment_id: {shipment_id} but whose ID is NOT present in the manifest items list. Classify each such file as orphan.

5. Produce report and store at .backlogit/reconcile/{shipment_id}-{mode}-{timestamp}.md.

6. Gate decision:

   • If all items are matched or pre-archived and no orphans exist → recommendation: PROCEED
   • If any missing, status-mismatch, or orphan items exist → recommendation: HALT — operator reconcile required
   • On HALT: emit the report path, release the lock, and halt with RECONCILE_FAIL. Do NOT call backlogit_ship_shipment.
   • On PROCEED from Ship Step 6: retain the lock until post-mode completes.

Post-Mode

1. Verify archive presence: List .backlogit/archive/ and confirm a file exists for the shipment itself ({shipment_id}.*).

2. Per-item archive check: For every item in the manifest, verify a corresponding archive file exists. If any are absent, flag them in the report.

3. Deleted-file guard (known backlogit_ship_shipment quirk — see P-007): Run git status -- ".backlogit/archive/" and inspect for deletions. If any archive files are reported as deleted, recommend git restore .backlogit/archive/ before the commit step.

4. Produce post-mode report per the same schema.

5. Gate decision:

   • If all archive files present and no deletions detected → recommendation: PROCEED
   • If missing archive files or unrestored deletions detected → recommendation: HALT — restore archives
   • On HALT: release the lock and report. Ship must restore archives before committing.

6. Release lock (acquired in step 1 of pre-mode): Invoke file-lock release for .backlogit/queue/{shipment_id}.md. If release fails, log a warning — stale locks are operator-recoverable.

Lock-Conflict Scenario

If pre-mode cannot acquire the lock because another process holds it:

1. Retry once after 30 seconds.
2. If retry also fails, count as a session stall and prompt the operator: Shipment lock conflict on {shipment_id}. Another process holds the lock.
3. Do NOT proceed without the lock. Do NOT call backlogit_ship_shipment.

Quality Criteria

• mode: pre runs before every backlogit_ship_shipment call in Ship Step 6
• mode: pre with expected_status: queued (or active for already-claimed shipments) runs at Ship Step 0.5 intake
• mode: post runs after every archive + restore sequence in Ship Step 6
• All five item classifications are represented in the schema
• Lock is acquired before pre-mode and released after post-mode (or on any halt)
• Report-and-halt is the only mutation path; no auto-prune

Related Artifacts

• .github/skills/file-lock/SKILL.md — lock acquisition/release primitives
• .github/agents/ship.agent.md — integration points (Step 0.5, Step 6)
• .github/agents/stage.agent.md — scope guard (Step 5.5)
• .github/policies/workflow-policies.md — P-007 archive integrity policy

Model Routing

This skill operates at Tier 2 (Standard) — file scanning and frontmatter comparison do not require frontier-level reasoning.

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