Session Recovery Packet: Client Migration

Goal and Scope

Migrate the HTTP client without public behavior changes. Scope is src/client.py and tests/test_client.py; deployment and external writes are blocked.

Durable State

Manifest migration-v2 records the current branch, dependency version, task status, file hash 4cc0-demo, 12 passing tests, one blocked timeout case, and artifact IDs. Conversation history is not authoritative.

Revalidation

Revalidate branch, dependency behavior, file hash, focused tests, and current approval before the next edit. A changed dependency invalidates the old plan.

Side Effect Reconciliation

Tool call write-018 has an unknown outcome. Compare the persisted hash before retry. Reuse idempotency key migration-client-v2-write-018; never issue a new write identity until reconciliation is complete.

Context Budget

Twenty percent holds goal and constraints, 20 percent current manifest state, 45 percent decision-relevant evidence, and 15 percent output contract. Raw logs remain behind artifact references.

Independent Review

An isolated reviewer receives the diff, requirements, tests, and rubric. It returns complete, partial, or blocked with evidence and no implementation transcript.