# Requirements: v1.62 Scratchpad And Negative Result Runtime Surface

## Milestone Goal

Close the first production slice of backlog `999.28` by giving AITP a durable
topic-scoped scratchpad surface for route comparison, open questions, failed
attempts, and negative-result retention.

## Shipped Requirements

- [x] `REQ-SCRATCH-01`: AITP materializes a topic-scoped `scratchpad` artifact
  that exposes scratch entries and negative-result counts as durable runtime
  state.
- [x] `REQ-SCRATCH-02`: operators can record scratch notes and negative results
  through real production service and CLI entrypoints.
- [x] `REQ-SCRATCH-03`: runtime/status surfaces and the progressive-disclosure
  bundle expose `scratchpad` as a first-class durable surface.
- [x] `REQ-VERIFY-01`: the milestone closes with targeted regressions,
  maintainability-budget verification, and a green full knowledge-hub suite.

## Final Traceability

| Requirement | Assigned Phase | Final Status | Evidence |
| --- | --- | --- | --- |
| `REQ-SCRATCH-01` | `118`, `119` | validated | `scratchpad.active.json/md` plus helper/service tests |
| `REQ-SCRATCH-02` | `119` | validated | `record-scratch-note`, `record-negative-result`, and `scratch-log` |
| `REQ-SCRATCH-03` | `119` | validated | `topic_status`, dashboard, and runtime-bundle exposure |
| `REQ-VERIFY-01` | `120` | validated | targeted regression slice, maintainability gate, and full suite |
