# Issue #753 — KBN-010 threat, authorization, and constraint-impact gate

## Objective

Complete the mandatory threat/auth/constraint-impact analysis that gates KBN-100 schema implementation.

## Scope

- In: threat matrix, frozen-control mapping, schema/API/test impact inventory, security evidence plan.
- Out: runtime, schema, migration, API, dependency, CI, deployment, and secret changes.
- Canonical requirements: `docs/requirements/native-kanban-sot.md`.
- Frozen contract: `docs/native-kanban-sot/SHARED-CONTRACT.md` and `contracts/*.v1.ts`.
- Tracking: Mosaic Stack issue #753.

## Plan

1. Independently inspect current-main implementation and frozen canon.
2. Enumerate tenant, identity, health-proof, approval, fencing, proposal, audit, token, and outage threats.
3. Map every threat to required constraints, command behavior, negative tests, and owning future slice.
4. Surface any unresolved schema impact as a blocker; do not silently amend the frozen contract.
5. Run documentation/static validation and submit for independent SecReview.

## Execution log

- 2026-07-14: KBN-000 completed through PR #752 and post-merge pipeline #1798.
- 2026-07-14: KBN-010 issue #753 created; task marked in progress; fresh GPT worker pending dispatch.

## Verification evidence

Pending worker validation, independent SecReview, Ultron gate, PR merge, post-merge CI, and issue closure.

## 2026-07-14 worker analysis checkpoint

- Inspected issue #753, canonical requirements, all frozen v1 contracts, and actual `origin/main` at `49e8a54` across DB schema, Better Auth scope, project/task/mission/team repositories/controllers, fleet backlog, and `TASKS.md` parsing/writing.
- Confirmed the worker branch has no source/runtime/schema delta from `origin/main`; orchestrator-owned `.mosaic` state remains dirty and untouched.
- Authored the threat, authorization, constraint-impact, negative-test, and requirements-traceability analysis in `docs/native-kanban-sot/KBN-010-THREAT-AUTH-CONSTRAINT-GATE.md`.
- Gate decision: **BLOCKED** by `KBN010-SI-001`. `missionsV1` lacks a unique candidate key on `(workspace_id, id)`, while `artifacts_workspace_mission_fk` and `approval_decisions_workspace_mission_fk` both reference that exact pair. PostgreSQL cannot create the frozen composite foreign keys as declared.
- Decision: do not select or apply a schema fix. Contract authority must version either a `(workspace_id, id)` mission candidate key or project-congruent child keys, then obtain independent re-review before KBN-100.
- Additional risks are controlled by frozen transaction/API behavior but require the exact future negative tests cataloged in the deliverable, especially active membership, service-token revocation, same-workspace semantic evidence checks, no-oracle behavior, and serialized parent/DAG cycle checks.
- OpenBrain startup recall was attempted but unavailable because `/home/hermes/.config/mosaic/credentials.json` is absent; no project state was written to an alternate memory silo.
- TDD: not applicable; this slice changes documentation/test-plan analysis only and implements no runtime behavior.

## Validation log

- `pnpm exec prettier --check docs/native-kanban-sot/KBN-010-THREAT-AUTH-CONSTRAINT-GATE.md docs/scratchpads/753-kbn010-threat-gate.md` — PASS.
- Changed-doc link validator — PASS (`relative_links=0`, one external issue link); `curl -fsSIL https://git.mosaicstack.dev/mosaicstack/stack/issues/753` — PASS.
- The first inline link-validator invocation had a Python f-string syntax error; corrected once and rerun successfully without changing the deliverable.
- `pnpm format:check` — PASS.
- `pnpm lint` — PASS (23 tasks successful).
- `pnpm typecheck` — PASS (42 tasks successful).
- `pnpm exec tsc -p docs/native-kanban-sot/tsconfig.json --noEmit` — PASS.
- Scoped diff review — PASS: authored delta is limited to the exclusive deliverable and this scratchpad; no runtime/schema/config/dependency/CI/deployment file is changed, and `docs/native-kanban-sot/TASKS.md` has no worker worktree delta from tracking commit `9b55de0`.
- Independent SecReview remains pending and cannot return PASS until contract authority resolves `KBN010-SI-001`.
- Final formatting/diff/test-ID completeness review — PASS (all catalog prefixes contiguous with no duplicate IDs).
- Remaining: scoped commit, queue guard, and push.

## 2026-07-14 KBN010-SI-001 contract-authority amendment

- Authority: `web1:mosaic-100` directed the minimal rc.4 amendment under issue #753: add a non-partial unique candidate key on `missions(workspace_id, id)` while retaining global `missions.id` uniqueness and the project-congruent `(workspace_id, project_id, id)` key.
- Rationale: artifacts and approval decisions are polymorphic exactly-one-target records and do not consistently carry `project_id`; widening both children would broaden frozen v1 semantics without improving tenant safety.
- Plan: amend only the frozen schema contract and shared contract, freeze exact DDL ordering and future migration negatives, run scoped/full validation and independent review, then commit and push without opening/merging a PR or closing #753.
- TDD: not applicable because this is a design-contract amendment with no runtime schema or migration implementation; rc.4 freezes future executable empty/prod/N-1/rollback/foreign-workspace and duplicate-key-feasibility tests.
- Budget: no explicit cap supplied; use a 20K-equivalent soft working cap and one bounded worker lane.
- Read-only #757 boundary: PR #757 adds separate logical-agent connector lease/CAS fencing (`logical_agent_connector_leases.lease_epoch`) in runtime schema and connector contracts. SI-001 changes only the frozen mission candidate key; it does not consume, alter, or reinterpret connector fencing, task fencing, lease authority, or #757 ownership.

### Amendment verification evidence

- Frozen schema: added exactly one non-partial `missions_workspace_id_uidx` on `(workspace_id, id)`; retained the global `id` primary key and `missions_workspace_project_id_uidx` on `(workspace_id, project_id, id)`.
- FK reconciliation: targeted static checks prove the candidate key precedes both `artifacts_workspace_mission_fk` and `approval_decisions_workspace_mission_fk`; each continues to reference exact ordered columns `(workspace_id, mission_id)` → `missions(workspace_id, id)` with RESTRICT deletion.
- Shared contract: candidate version is `1.0.0-rc.4`; authority, rationale, exact effect/non-effect, candidate-before-FK DDL order, duplicate feasibility, empty/prod/N-1/rollback/foreign-workspace future tests, and unchanged KCR/SOT/tenant/proposal/fencing/no-cascade invariants are explicit.
- Changed-file Prettier, contract ESLint, `pnpm exec tsc -p docs/native-kanban-sot/tsconfig.json`, and targeted SI-001 static checks — PASS.
- Full `pnpm format:check && pnpm lint && pnpm typecheck` — PASS (23 lint tasks and 42 typecheck/build tasks).
- Independent Codex security review — PASS, zero critical/high/medium/low findings; tenant isolation is preserved.
- Independent Codex code review confirmed the candidate key repairs both FK targets and reported no blocker on the authorized delta. Its initial request to rewrite the historical KBN-010 verdict conflicts with the exclusive scope and was resolved by documenting the immutable-evidence boundary in rc.4; its remaining finding concerns pre-existing live `.mosaic` session files, which are untouched and excluded from this commit.
- Scoped diff: only the two frozen contract files and this append-only scratchpad amendment are staged for delivery; no runtime schema, migration, task plan, gate verdict, provider artifact, or #757-owned file is included.

## 2026-07-14 final rc.4 KBN-010 disposition

- Control-plane direction authorized final disposition edits only to `docs/native-kanban-sot/KBN-010-THREAT-AUTH-CONSTRAINT-GATE.md` and this append-only scratchpad; contract author `web1:kbn-contract` remained idle and undisturbed.
- Exact reviewed contract object: commit `3f6a3387b419eb99453ee10dd25ba888faaab0b5`, tree `7ebab8fa530a7180036928cea9527f808548aa14`.
- Corroborating review identities: full-index SHA-256 `6b40a76265c4f3e6d1d30a7f262a2dd16e0d51997e99c146b59f527e6524cd42`; stable patch-id `058cf98026fcd1043703c866aee047c8bb144740`. A command-rendered patch digest varied by Git rendering command/options and is non-authoritative; commit+tree+exact file content are canonical.
- Independent Homelab non-author schema/security review verdict: **APPROVE**. It confirmed the rc.4 `missions_workspace_id_uidx(workspace_id,id)` repairs both dependent FKs while retaining the global PK and project-congruent key; tenant, polymorphic exactly-one-target, RESTRICT/no-cascade, N-1/rollback semantics remain valid.
- Read-only #757 cross-check: no shared table, index, FK, identity, fence, or authority collision with connector lease/CAS fencing.
- Final KBN-010 gate decision: **PASS / GO** at rc.4 with `UNRESOLVED SCHEMA IMPACTS` equal to exact `none`. Historical SI-001 detection remains in the gate document as evidence that rc.3 was invalid.
- No runtime schema/migration/API/config/dependency/CI/deployment implementation is claimed. KBN-100 must still implement candidate-before-dependent-FK ordering, duplicate feasibility, empty/prod/N-1/rollback evidence, exact FK reconciliation, and separate artifact/approval foreign-workspace negatives (N100-45..50).
- TDD remains not applicable because this continuation changes only documentation/evidence disposition and no runtime behavior.
- Remaining orchestrator-owned sequence: worker validation/commit/push → PR open/update → Ultron review → squash merge → terminal-green post-main CI → close #753 → release KBN-100. KBN-100 is not released earlier.

### Final worker validation

- Changed-doc Prettier and link checks — PASS; issue #753 external link returned successfully.
- Static future-test catalog check — PASS: all prefixes are individually enumerated, contiguous, and duplicate-free; N100 now spans N100-01..50.
- rc.4 disposition assertions — PASS: gate status PASS/GO, frozen target rc.4, exact `none` unresolved section, independent APPROVE, review identities, and N100-50 are present.
- Review identity reproduction — PASS: commit tree `7ebab8fa530a7180036928cea9527f808548aa14`, full-index SHA-256 `6b40a76265c4f3e6d1d30a7f262a2dd16e0d51997e99c146b59f527e6524cd42`, and stable patch-id `058cf98026fcd1043703c866aee047c8bb144740` match.
- rc.4 frozen-contract static check — PASS: the candidate key is unique in the declaration and precedes both dependent FKs; frozen contract files remain byte-identical to commit `3f6a3387b419eb99453ee10dd25ba888faaab0b5`.
- `pnpm exec tsc -p docs/native-kanban-sot/tsconfig.json --noEmit` — PASS.
- `pnpm format:check` — PASS.
- `pnpm lint` — PASS (23 tasks successful).
- `pnpm typecheck` — PASS (42 tasks successful).
- Scoped diff — PASS: only the gate document and this scratchpad are authored changes; contracts, TASKS, requirements, runtime/schema/migration/config/dependency/CI/deployment and #757-owned files are unchanged. Live `.mosaic` session state remains untouched and excluded.
- Remaining worker steps: final formatting/scoped staging, commit `docs(#753): clear KBN-010 schema gate`, queue guard, push, and control-plane notification.
