Wave 64 Session Prompt

Session type: Code session. Single wave, one commit. State when written: Wave 63 complete. ~4045 tests pass (0 failed, 2 skipped). 120 modules (ceiling: 125 ✅).

W63 COMPLETE ✅

Task	Status
`CloudDB.read_tenant_compliance_history(tenant_id)` — day-bucketed `[{date, score, grade}]` sorted ASC	✅
`_db_read_tenant_compliance_history()` helper in api.py (SQLite + in-memory fallback)	✅
`GET /cloud/tenants/{tenant_id}/compliance-history` endpoint	✅
`tests/test_squash_w63.py` — 16 tests (CloudDB×8, API×8), all passing	✅

W62 COMPLETE ✅

Task	Status
`CloudDB.read_tenant_compliance_score(tenant_id)` — score 0–100 + grade A/B/C/D/F	✅
`_db_read_tenant_compliance_score()` helper in api.py (SQLite + in-memory fallback)	✅
`GET /cloud/tenants/{tenant_id}/compliance-score` endpoint	✅
`tests/test_squash_w62.py` — 16 tests (20 collected), all passing	✅

W61 COMPLETE ✅

Task	Status
`CloudDB.read_tenant_summary(tenant_id)` — composes 4 per-tenant reads	✅
`_db_read_tenant_summary()` helper in api.py (SQLite + in-memory fallback)	✅
`GET /cloud/tenants/{tenant_id}/summary` endpoint	✅
`tests/test_squash_w61.py` — 16/16 passing	✅

W60 COMPLETE ✅

Task	Status
`CloudDB.read_drift_events(tenant_id)`	✅
`CloudDB.read_tenant_policy_stats(tenant_id)`	✅
`_db_read_drift_events/policy_stats()` helpers in api.py	✅
`GET /cloud/tenants/{id}/drift-events` endpoint	✅
`GET /cloud/tenants/{id}/policy-stats` endpoint	✅
`tests/test_squash_w60.py` — 16/16 passing	✅
Fix: `_C` NameError in server.py (hoisted import)	✅
Fix: server.py line count gate (4743 ≤ ceiling)	✅

W59 COMPLETE ✅

Task	Status
`CloudDB.delete_tenant(tenant_id)` — cascade DELETE tenants + all data tables	✅
`TenantUpdateRequest` Pydantic model (optional name / plan / contact_email)	✅
`_db_delete_tenant()` helper — in-memory pop × 5 stores + CloudDB cascade	✅
`PATCH /cloud/tenant/{tenant_id}` — delta-merge, 404 for unknown, updates `updated_at`	✅
`DELETE /cloud/tenant/{tenant_id}` — 204 No Content, 404 for unknown, cascade-clears all data	✅
`tests/test_squash_w59.py` — 15/15 passing (CloudDB×5, PATCH×5, DELETE×5)	✅

W58 COMPLETE ✅

Task	Status
`CloudDB.read_inventory(tenant_id)`	✅
`CloudDB.read_vex_alerts(tenant_id)`	✅
`CloudDB.read_policy_stats()` (cross-tenant aggregate)	✅
`_db_read_inventory/vex_alerts/policy_stats()` helpers in api.py	✅
`GET /cloud/tenants/{id}/inventory` endpoint	✅
`GET /cloud/tenants/{id}/vex-alerts` endpoint	✅
`GET /cloud/policy-stats` endpoint	✅
`tests/test_squash_w58.py` — 16/16 passing	✅
AQLM lm_eval validation	⚠️ PENDING (lm_eval-waiver filed)

W57 COMPLETE ✅

Task	Status
`squish/cli.py` mixed_attn calibration fix (`outlier_threshold=100.0`)	✅
AQLM loader wired (`compressed_loader.py` lines 660-691, W56)	✅
`POST /drift-check` REST endpoint in `squish/squash/api.py`	✅
`squish/squash/cloud_db.py` — SQLite write-through backend	✅
All 5 api.py CloudDB write points wired	✅
`tests/test_squash_w57.py` — 20/20 passing	✅
AQLM lm_eval validation	⚠️ PENDING (lm_eval-waiver filed)

PRE-WORK: AQLM lm_eval gate (carries forward from W58)

Still pending. Run before any AQLM-dependent work. Waiver format documented in prior waves.

W64 — Cross-tenant compliance overview

Purpose: Add GET /cloud/compliance-overview — an aggregate view across all registered tenants showing platform-wide compliance health. This closes the read-only reporting layer started in W58 before moving to write/mutation endpoints.

W62 answers “what is this tenant's current posture?” W63 answers “how has this tenant's posture evolved?” W64 answers “how is the entire platform doing right now?”

Response shape:

{
  "total_tenants": 12,
  "compliant_tenants": 9,
  "non_compliant_tenants": 3,
  "average_score": 82.4,
  "top_at_risk": [
    {"tenant_id": "acme", "score": 41.0, "grade": "D"},
    {"tenant_id": "globex", "score": 53.5, "grade": "C"},
    {"tenant_id": "initech", "score": 61.0, "grade": "C"}
  ]
}

compliant_tenants = count where score ≥ 80.0 (grade A or B).
non_compliant_tenants = count where score < 80.0.
average_score = mean of all per-tenant scores; 0.0 when no tenants exist.
top_at_risk = up to 3 tenants sorted ascending by score (worst first).
Empty platform (no tenants) → {total_tenants: 0, compliant_tenants: 0, non_compliant_tenants: 0, average_score: 0.0, top_at_risk: []}.

Method to add in `squish/squash/cloud_db.py`

def read_compliance_overview(self) -> dict:
    """Return platform-wide compliance aggregate across all tenants.

    Returns: {total_tenants, compliant_tenants, non_compliant_tenants,
              average_score, top_at_risk: [{tenant_id, score, grade}, ...]}.
    compliant = score >= 80.0 (grade A or B).
    top_at_risk = up to 3 lowest-scoring tenants, sorted ascending.
    """

Pattern: fetch all tenant IDs from the tenants table, call read_tenant_compliance_score() for each, aggregate. For SQLite this is a small loop (bounded by tenant count, not event count).

Insertion point: after read_tenant_compliance_history() and before delete_tenant().

Endpoint to add in `squish/squash/api.py`

GET /cloud/compliance-overview

No path parameter — cross-tenant aggregate.
Returns HTTP 200 always (empty response for no tenants).
Backed by _db_read_compliance_overview() helper + in-memory fallback.

In-memory fallback: iterate _tenants.keys(), call _db_read_tenant_compliance_score() for each, aggregate counts + scores, sort by score for at_risk.

Insertion point (helper): after _db_read_tenant_compliance_history() and before # ── Cloud auth helpers. Insertion point (endpoint): after cloud_get_tenant_compliance_history and before def _result_to_dict.

Tests — `tests/test_squash_w64.py` (new file, 16 tests)

TestCloudDBComplianceOverview (8 tests):

test_returns_dict — result is a dict
test_empty_platform_all_zeros — no tenants → zeros, empty top_at_risk
test_single_tenant_compliant — freshly-upserted tenant (100.0 score) → compliant_tenants=1
test_single_tenant_non_compliant — inject policy failures → non_compliant_tenants=1
test_total_count_correct — 3 tenants → total_tenants=3
test_average_score_is_float — average_score is a float
test_top_at_risk_sorted_ascending — 3 tenants, different scores → worst first
test_top_at_risk_capped_at_three — 5 tenants → len(top_at_risk) ≤ 3

TestCloudAPIComplianceOverviewEndpoint (8 tests):

test_200_response — GET returns 200
test_response_has_required_keys — all 5 keys present
test_empty_platform — no tenants → zero counts, empty top_at_risk
test_total_tenants_count — inject 2 tenants → total_tenants=2
test_compliant_count — 2 tenants, no failures → compliant_tenants=2
test_average_score_nonzero_with_tenants — 2 tenants → average_score > 0
test_top_at_risk_is_list — top_at_risk is a list
test_no_path_parameter — endpoint accessible at /cloud/compliance-overview

Total: 16 new tests. Suite target: ~4061 passing after W64.

Ship Gate — Done When (all 5 required)

Tests: python3 -m pytest tests/ --tb=no -q → 0 failures. tests/test_squash_w64.py included, 16 tests passing.
Memory: No new in-memory structures introduced.
CLI: No new CLI flags.
CHANGELOG: Wave 64 entry prepended in CHANGELOG.md.
Module count: ≤ 125 (no new production module, test file only).

Key Files

File	W64 Action
`squish/squash/cloud_db.py`	Add `read_compliance_overview()` (aggregate loop over all tenants)
`squish/squash/api.py`	Add `_db_read_compliance_overview()` helper + `GET /cloud/compliance-overview` endpoint
`tests/test_squash_w64.py`	New file — 16 tests (CloudDB×8, API×8)
`CHANGELOG.md`	Prepend Wave 64 entry

Implementation Notes

SQLite path: CloudDB.read_compliance_overview() fetch all IDs:

with self._lock:
    rows = self._conn.execute("SELECT tenant_id FROM tenants").fetchall()

Loop calling self.read_tenant_compliance_score(tid) for each, then aggregate.

Compliant threshold: score >= 80.0. Define as module-level constant _COMPLIANCE_THRESHOLD = 80.0 in cloud_db.py if not already present.

test_single_tenant_non_compliant (CloudDB): inject rows into policy_stats with explicit pass_count < total_count via db._conn.execute() — append_policy_stat auto-derives from the payload, so direct SQL is required.

_rate_window.clear() must appear in setup_method for all API tests to prevent 429 bleed.

lm_eval Status (last validated, 2026-03-28–2026-04-02)

Model	Format	arc_easy	Notes
Qwen2.5-1.5B	INT4 AWQ g=32 (squish)	70.8%	W42 canonical baseline
Qwen2.5-1.5B	INT3 g=32	67.2%	−3.4pp; "efficient" tier; below 72% gate
Qwen2.5-1.5B	AQLM	❓ PENDING	Pre-work gate, carries forward
Qwen2.5-1.5B	INT2 naive	~29%	Incoherent — never ship
gemma-3-1b/4b	INT3	−15–16pp	UNSAFE — do not recommend
Qwen3-4B	INT3	−14.8pp	UNSAFE
Qwen3-8B	INT3	−7.8pp	Coherent but large delta

Context Markers

squash module path: squish/squash/
server.py ceiling: 4743 lines — W64 routes live in squash/api.py, no server.py changes needed

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Wave 64 Session Prompt

W63 COMPLETE ✅

W62 COMPLETE ✅

W61 COMPLETE ✅

W60 COMPLETE ✅

W59 COMPLETE ✅

W58 COMPLETE ✅

W57 COMPLETE ✅

PRE-WORK: AQLM lm_eval gate (carries forward from W58)

W64 — Cross-tenant compliance overview

Method to add in `squish/squash/cloud_db.py`

Endpoint to add in `squish/squash/api.py`

Tests — `tests/test_squash_w64.py` (new file, 16 tests)

Ship Gate — Done When (all 5 required)

Key Files

Implementation Notes

lm_eval Status (last validated, 2026-03-28–2026-04-02)

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Wave 64 Session Prompt

W63 COMPLETE ✅

W62 COMPLETE ✅

W61 COMPLETE ✅

W60 COMPLETE ✅

W59 COMPLETE ✅

W58 COMPLETE ✅

W57 COMPLETE ✅

PRE-WORK: AQLM lm_eval gate (carries forward from W58)

W64 — Cross-tenant compliance overview

Method to add in squish/squash/cloud_db.py

Endpoint to add in squish/squash/api.py

Tests — tests/test_squash_w64.py (new file, 16 tests)

Ship Gate — Done When (all 5 required)

Key Files

Implementation Notes

lm_eval Status (last validated, 2026-03-28–2026-04-02)

Context Markers

Method to add in `squish/squash/cloud_db.py`

Endpoint to add in `squish/squash/api.py`

Tests — `tests/test_squash_w64.py` (new file, 16 tests)