docs(qual): reconcile coverage closure plan

.agent-loop/initiatives/WS-QUAL-001-backend-coverage-floor/CHUNK_MAP.md

@@ -1,36 +1,30 @@
 # Chunk Map: WS-QUAL-001 Backend Coverage Floor
 
-| Chunk | Scope | Risk | State |
+## Historical completed work
+
+| Chunk | Durable outcome | State |
+|---|---|---|
+| `WS-QUAL-001-PLAN` | Original 90-percent initiative plan | Merged PR #99; superseded by PLAN2 sequencing |
+| `WS-QUAL-001-01` | Original combined harness/baseline contract | Superseded by the 01A/01B split before implementation |
+| `WS-QUAL-001-01A` | Isolated least-privilege database runner | Merged PR #103 |
+| `WS-QUAL-001-01B1A-R2` | Coverage configuration/evidence grammar | Merged PR #105 |
+| `WS-QUAL-001-01B1B-R10` | Conservative test-weakening semantic guard | Merged PR #108 |
+
+All other 01B/01B1/01B1A/01B1B replacement attempts are stopped historical
+experiments. Do not resume them. `WS-QUAL-001-01B2` and the old 02-06 milestone
+ladder are superseded before implementation.
+
+## Current sequence
+
+| Chunk | Purpose | Risk | State |
 |---|---|---:|---|
-| `WS-QUAL-001-01` | Combined harness/baseline contract | L1 | Split after circuit-breaker review |
-| `WS-QUAL-001-01A` | Isolated least-privilege database runner and two-phase complete-suite CI | L1 | Merged through PR #103 as `2901a3e` |
-| `WS-QUAL-001-01B` | Combined coverage policy, baseline, and CI ratchet | L1 | Circuit breaker triggered at 480/500 before required proof; split proposed |
-| `WS-QUAL-001-01B1` | Combined parser and semantic-delta policy core | L1 | Blocked at 496/500 after two repair cycles; superseded by 01B1A/01B1B |
-| `WS-QUAL-001-01B1A` | Read-only coverage arithmetic and bounded policy parsers | L1 | Blocked at 394/400 after two parser repair cycles |
-| `WS-QUAL-001-01B1A-R1` | Replacement parser candidate closing two normalization bypasses | L1 | Stopped at `c0fa4a2`; superseded by R2 |
-| `WS-QUAL-001-01B1A-R2` | Canonical coverage.py exclusion grammar closure | L1 | Merged through PR #105 as `8a4182e` |
-| `WS-QUAL-001-01B1B` | Repository-delta and semantic test-integrity guards | L1 | Blocked at 223/300 after two binding repair cycles |
-| `WS-QUAL-001-01B1B-R1` | Lexical binding closure for semantic guards | L1 | Stopped at first size checkpoint; superseded by R2 |
-| `WS-QUAL-001-01B1B-R2` | Measured lexical binding closure | L1 | Blocked at 348/350 after cycle-zero proof-fit failure |
-| `WS-QUAL-001-01B1B-R3` | Stdlib symtable lexical closure | L1 | Blocked at 468/500 before cycle-one repair |
-| `WS-QUAL-001-01B1B-R4` | Complete symtable control/value flow | L1 | Blocked at 535/550 after cycle-zero review |
-| `WS-QUAL-001-01B1B-R5` | Single-pass abstract flow closure | L1 | Blocked at 641/650 after cycle-zero review |
-| `WS-QUAL-001-01B1B-R6` | Transitive provenance closure | L1 | Blocked at 800/800 after cycle-one review |
-| `WS-QUAL-001-01B1B-R7` | Recursive iterable provenance | L1 | Stopped after final two-cycle review; do not resume |
-| `WS-QUAL-001-01B1B-R8` | Conservative syntactic integrity policy | L1 | Stopped after final review found Python 3.11 scope incompatibility |
-| `WS-QUAL-001-01B1B-R9` | Python 3.11 comprehension scope compatibility | L1 | Stopped after final Python 3.13 TypeVar child-order finding |
-| `WS-QUAL-001-01B1B-R10` | Python 3.13 TypeVar child order | L1 | Merged through PR #108 as `5c47aba` |
-| `WS-QUAL-001-01B2` | Git provenance, configured baseline evidence, and CI ratchet | L1 | Inactive pending explicit user start |
-| `WS-QUAL-001-02` | Project setup/policy/correction service coverage; floor at least 82% | L1 | Inactive |
-| `WS-QUAL-001-03` | Project repository/router coverage; floor at least 84% | L1 | Inactive |
-| `WS-QUAL-001-04` | Task service/repository/router coverage; floor at least 86% | L1 | Inactive |
-| `WS-QUAL-001-05` | Checker service/runner/repository/router/worker coverage; floor at least 88% | L1 | Inactive |
-| `WS-QUAL-001-06` | Enumerated residual gaps and permanent 90% CI floor | L1 | Inactive |
+| `WS-QUAL-001-PLAN2` | Reconcile current hosted baseline, retire obsolete machinery, and define the small closure sequence | L1 | Planning in progress |
+| `WS-QUAL-001-02R` | Project/setup observable behavior coverage | L2 | Proposed after PLAN2 |
+| `WS-QUAL-001-03R` | Checker observable behavior coverage | L2 | Proposed after 02R only if more headroom is needed |
+| `WS-QUAL-001-04R` | Change the exact global hosted CI floor from 78 to 90 after current-main proof | L1 | Proposed after measured >=90.25% proof |
 
-Each coverage-test chunk is limited to 500 implementation lines, except the
-reviewed chunk-01A genuine-proof exception capped at 700. Missing its numeric
-floor or size budget stops the chunk for replanning;
-scope does not spill into the next chunk. A later chunk may start only after the
-prior PR merges, post-merge evidence plus initiative `STATUS.md` and global
-`LOOP_STATE.md`, `WORK_QUEUE.md`, and `REVIEW_LOG.md` are updated and merged,
-and the user provides a new start signal.
+One chunk maps to one PR. A test chunk may close early when its behavioral scope
+is exhausted. The next contract refreshes from current `main`; stale missing-line
+inventories are never implementation authority. If 02R and 03R are
+insufficient, PLAN2 must be amended with one exact owner-specific successor;
+there is no mixed residual-coverage chunk.