diff --git a/docs/timeline.md b/docs/timeline.md
index 9f93452ee..bdb40e210 100644
--- a/docs/timeline.md
+++ b/docs/timeline.md
@@ -10,23 +10,22 @@ The following chart shows all 29 epics across 9 legendary workstreams, 7 milesto
 @startgantt
 
 title CleverAgents Core — Epic-Level Project Schedule
-footer Generated 2026-04-06 | 29 Epics | 9 Legendaries | 7 Milestones | 6 Developers | ~1650 SP | 878 open bugs | 108 open PRs | Session 3 active
+footer Generated 2026-04-08 | 29 Epics | 9 Legendaries | 7 Milestones | 6 Developers | ~1650 SP | 1445 open bugs | 131 open PRs | Session 4 active
 
 Project starts 2026-02-03
 saturday are closed
 sunday are closed
 printscale weekly zoom 2
 
-today is 2026-04-06
+today is 2026-04-08
 today is colored in #FF6666
 
 ' ================================================================
-'  GANTT CHART UPDATE LOG (Day 96 — 2026-04-06)
-'  Changes: Day 96 refresh. Open PRs: 183→108 (-75 PRs merged/closed!). Open bugs: ~878 (stable).
-'  M3 65% (246/377), M4 60% (109/183), M5 68% (136/199), M6 55% (180/327),
-'  M7 43% (152/350), M8 46% (418/917), M9 28% (131/467).
-'  Significant progress: M3 +4%, M4 +3%, M5 +4%, M7 +2%, M8 +5%, M9 +3%.
-'  Session 3 active. Session tracker issue: #3775. PR #3774 open (Click 8.2+ fix).
+'  GANTT CHART UPDATE LOG (Day 98 — 2026-04-08)
+'  Changes: Day 98 refresh (Apr 8). Open PRs: 108→131 (+23 net new since Day 96). Open bugs: ~878→1445 (+567 new TDD/integration test failure issues).
+'  M3 74% (235/317), M4 67% (108/161), M5 73% (130/177), M6 47% (186/396),
+'  M7 50% (150/301), M8 51% (402/795), M9 31% (128/412).
+'  Session 4 active (#4373). Session 3 closed.
 ' ================================================================
 
 <style>
@@ -228,7 +227,7 @@ ganttDiagram {
 
 [Decisions + Validations M3 (#357)] as [M3] on {Luis} {Hamza} {Brent} {Jeff} requires 4 days
 [M3] starts at [M2]'s end
-[M3] is 65% completed
+[M3] is 74% completed
 [M3] is colored in LightSkyBlue/SteelBlue
 
 ' ── v3.3.0 MILESTONE ─────────────────────────────────────────
@@ -249,7 +248,7 @@ ganttDiagram {
 
 [Corrections + Checkpoints M4 (#358)] as [M4] on {Luis} {Jeff} {Brent} {Hamza} requires 3 days
 [M4] starts at [M3]'s end
-[M4] is 60% completed
+[M4] is 67% completed
 [M4] is colored in LightSkyBlue/SteelBlue
 
 
@@ -280,12 +279,12 @@ ganttDiagram {
 
 [ACMS v1 + Context Scaling M5 (#359)] as [M5] on {Hamza} {Jeff} {Aditya} {Brent} requires 4 days
 [M5] starts at [M4]'s end
-[M5] is 68% completed
+[M5] is 73% completed
 [M5] is colored in LightSkyBlue/SteelBlue
 
 [Autonomy Hardening + Stubs M6 (#360)] as [M6] on {Luis} {Jeff} {Hamza} {Brent} requires 5 days
 [M6] starts at [M5]'s end
-[M6] is 55% completed
+[M6] is 47% completed
 [M6] is colored in LightSkyBlue/SteelBlue
 
 
@@ -296,7 +295,7 @@ ganttDiagram {
 
 [Large Project Autonomy (#369)] as [LARGE] on {Luis} {Brent} {Jeff} requires 4 days
 [LARGE] starts 2026-03-17
-[LARGE] is 43% completed
+[LARGE] is 50% completed
 [LARGE] is colored in LightSkyBlue/SteelBlue
 
 ' ── v3.5.0 MILESTONE ─────────────────────────────────────────
@@ -442,7 +441,7 @@ saturday are closed
 sunday are closed
 printscale weekly zoom 2
 
-today is 2026-04-06
+today is 2026-04-08
 today is colored in #FF6666
 
 <style>
@@ -1182,7 +1181,7 @@ ganttDiagram {
 ' --- Decisions + Validations + Invariants (M3) (#357) ---
 [Decisions + Validations + Invariants (M3) (#357)] as [M3] on {Brent} {Hamza} {Jeff} {Luis} requires 4 days
 [M3] starts at [M2]'s end
-[M3] is 75% completed
+[M3] is 74% completed
 [M3] is colored in CornflowerBlue/MediumBlue
 
 [feat(decision): add decision domain and context... (#170)] as [I170] on {Hamza} lasts 1 day
@@ -1238,7 +1237,7 @@ ganttDiagram {
 ' --- Corrections + Subplans + Checkpoints (M4) (#358) ---
 [Corrections + Subplans + Checkpoints (M4) (#358)] as [M4] on {Brent} {Hamza} {Jeff} {Luis} requires 3 days
 [M4] starts at [M3]'s end
-[M4] is 78% completed
+[M4] is 67% completed
 [M4] is colored in CornflowerBlue/MediumBlue
 
 [feat(correction): add correction model and CLI ... (#181)] as [I181] on {Jeff} lasts 1 day
@@ -1320,7 +1319,7 @@ ganttDiagram {
 ' --- ACMS v1 + Context Scaling (M5) (#359) ---
 [ACMS v1 + Context Scaling (M5) (#359)] as [M5] on {Aditya} {Brent} {Hamza} {Jeff} requires 4 days
 [M5] starts at [M4]'s end
-[M5] is 87% completed
+[M5] is 73% completed
 [M5] is colored in CornflowerBlue/MediumBlue
 
 [feat(acms): add ACMS v1 context pipeline (#188)] as [I188] on {Hamza} lasts 1 day
@@ -1379,7 +1378,7 @@ ganttDiagram {
 ' --- Autonomy Hardening + Server Stubs (M6) (#360) ---
 [Autonomy Hardening + Server Stubs (M6) (#360)] as [M6] on {Brent} {Hamza} {Jeff} {Luis} requires 5 days
 [M6] starts at [M5]'s end
-[M6] is 71% completed
+[M6] is 47% completed
 [M6] is colored in CornflowerBlue/MediumBlue
 
 [feat(interfaces): add server client stubs (#201)] as [I201] on {Luis} lasts 1 day
@@ -1963,13 +1962,13 @@ This section provides a high-level overview of the CleverAgents implementation r
 
 ### Current Status Summary
 
-As of Day 96 (2026-04-06), the project has **108 open PRs** (down from 183 — 75 PRs merged/closed!) and **~1612 open issues** across 9 milestones. **Session 3 is active with full supervisor fleet: 16 parallel workers and ~71 total concurrent agents**. Bug count is **~878 open bugs** (stable). M8 (v3.7.0) is now **46% complete** (418/917 issues closed). M9 (v3.8.0) is **28% complete** (131/467 issues closed). M3 (v3.2.0) at **65%** (246/377), M4 (v3.3.0) at **60%** (109/183), M5 (v3.4.0) at **68%** (136/199), M6 (v3.5.0) at **55%** (180/327), M7 (v3.6.0) at **43%** (152/350).
+As of Day 98 (2026-04-08), the project has **131 open PRs** and **~2359 open issues** across 9 milestones. **Session 4 is active (#4373)**. Bug count is **~1445 open bugs** (up from ~878 — +567 new TDD/integration test failure issues filed). M8 (v3.7.0) is now **51% complete** (402/795 issues closed). M9 (v3.8.0) is **31% complete** (128/412 issues closed). M3 (v3.2.0) at **74%** (235/317), M4 (v3.3.0) at **67%** (108/161), M5 (v3.4.0) at **73%** (130/177), M6 (v3.5.0) at **47%** (186/396), M7 (v3.6.0) at **50%** (150/301).
 
-**M1, M2 fully complete. M3 (v3.2.0)**: 65% complete (246/377), 131 open issues. **M4 (v3.3.0)**: 60% complete (109/183), 74 open issues. **M5 (v3.4.0)**: 68% complete (136/199), 63 open issues. **M6 (v3.5.0)**: 55% complete (180/327), 147 open issues. **M7 (v3.6.0)**: 43% complete (152/350), 198 open issues. **M8 (v3.7.0)**: 46% complete (418/917), 499 open issues. **M9 (v3.8.0)**: 28% complete (131/467), 336 open issues. All milestones M3-M7 are **overdue**; M8 and M9 are in active v3.7.0/v3.8.0 development.
+**M1, M2 fully complete. M3 (v3.2.0)**: 74% complete (235/317), 82 open issues. **M4 (v3.3.0)**: 67% complete (108/161), 53 open issues. **M5 (v3.4.0)**: 73% complete (130/177), 47 open issues. **M6 (v3.5.0)**: 47% complete (186/396), 210 open issues. **M7 (v3.6.0)**: 50% complete (150/301), 151 open issues. **M8 (v3.7.0)**: 51% complete (402/795), 393 open issues. **M9 (v3.8.0)**: 31% complete (128/412), 284 open issues. All milestones M3-M7 are **overdue**; M8 and M9 are in active v3.7.0/v3.8.0 development.
 
-!!! warning "Schedule Risk: All Milestones M3-M7 Overdue — ~878 Open Bugs — Session 3 Active (Day 96: 75 PRs Merged, Significant Progress)"
+!!! warning "Schedule Risk: All Milestones M3-M7 Overdue — ~1445 Open Bugs — Session 4 Active (Day 98: +567 New Bug Issues, M3-M5 Progress)"
 
-    All milestones M3 through M7 have passed their target dates. **Session 3 is active with 16 parallel workers (~71 total agents)**. Open PRs at **108** (down from 183 — 75 PRs merged/closed!). Open bugs at **~878** (stable). Session tracker issue: #3775. **Current priorities**: (1) **Fix and merge PR #3774** (Click 8.2+ compatibility — CI failures in push-validation and coverage). (2) **Triage ~878 open bugs** — agent-driven expansion requires systematic review. (3) **Continue M8 push** — 46% complete, 499 issues remaining. (4) **Clear M3/M4/M5 backlogs** — M3 at 65% (131 open), M4 at 60% (74 open), M5 at 68% (63 open).
+    All milestones M3 through M7 have passed their target dates. **Session 4 is active (#4373)**. Open PRs at **131**. Open bugs at **~1445** (up from ~878 — +567 new TDD/integration test failure issues filed). **Current priorities**: (1) **Triage ~1445 open bugs** — massive agent-driven expansion requires systematic review. (2) **Continue M3/M4/M5 push** — M3 at 74% (82 open), M4 at 67% (53 open), M5 at 73% (47 open). (3) **Continue M8 push** — 51% complete, 393 issues remaining. (4) **Address M6 regression** — M6 dropped from 55% to 47% due to new issues being added.
 
 ### Parallel Workstreams
 
@@ -2074,10 +2073,11 @@ The following major areas are fully or substantially implemented:
 - **End-of-day CLI fix wave — 18 PRs merged (Day 53, end-of-day)**: Massive CLI compliance fix wave merged 18 PRs resolving spec-required output fields and panels. Key merges: fix(session) add name field and summary section to session list (#1574, v3.7.0, fixes #1520), docs(spec) remove optional parentheses from required --config flags (#1573), fix(cli) add Name column, Summary panel fields, and OK message to session list (#1570, v3.7.0), fix(cli) add Deletion Summary and Cleanup panels to session delete (#1569, v3.7.0), fix(cli) add Settings and Actor Details panels to session config (#1567, v3.7.0), fix(cli) add Automation field and success message to session create (#1566, v3.7.0), fix(cli) render spec-required Filters, Summary panels and Exit Code to session show (#1565, v3.7.0), fix(cli) render Actor Removed, Impact, and Cleanup panels for actor remove (#1563, v3.7.0), fix(cli) add Summary panel and success message to actor list (#1562, v3.7.0), fix(provider) make LangChainChatProvider name and model_id configurable (#1558, v3.7.0), fix(cli) make version command show actual git commit (#1556, v3.7.0, fixes #1520), docs(specification) reorder command synopsis to separate value args from flags (#1554). Open bugs reduced from **143 to 6** (137 bugs resolved). Open PRs at **74** (6 net new).
 - **Day 95 end-of-day merges — 5 PRs merged (Day 95, 2026-04-05)**: Additional spec compliance and fix PRs merged. Key merges: fix(cli) render spec-required panels in agents plan rollback rich output (#3279, v3.5.0, fixes #3445), fix(cli) add spec-required Validation and Merge panels and correct title/message in plan apply (#3460, v3.5.0), fix(cli) compute real impact counts in agents actor remove command (#3463, v3.5.0), fix(session) correct field names and data types in Session.as_cli_dict() for spec compliance (#3461, v3.5.0), fix(providers) remove type: ignore suppressions from registry.py and resolve underlying type errors (#3459, v3.5.0). Open PRs: 170→179 (+9 new agent PRs). Open bugs: 809→866 (+57 new UAT/bug-hunt bugs). M8 milestone grew from 796→822 issues.
 - **Day 96 session launch — 75 PRs merged/closed (Day 96, 2026-04-06)**: Session 3 new build session launched (issue #3775). Massive PR merge/close wave: open PRs dropped from 183 to 108 (-75 PRs). Milestone progress: M3 65% (246/377, +18 closed), M4 60% (109/183, +5 closed), M5 68% (136/199, +10 closed), M7 43% (152/350, +14 closed), M8 46% (418/917, +59 closed), M9 28% (131/467, +13 closed). PR #3774 (Click 8.2+ compatibility fix) opened and pending CI resolution. Session tracker: #3775. Priority issue #3776 created for PR #3774 CI failures.
+- **Day 98 — Session 4 launch + CI quality fix (Day 98, 2026-04-08)**: Session 4 launched (issue #4373). PR #4175 merged (fix: restore CI quality tests to passing state). Bug count surged from ~878 to ~1445 (+567 new TDD/integration test failure issues filed by agents). Milestone totals restructured: M3 235/317 (74%), M4 108/161 (67%), M5 130/177 (73%), M6 186/396 (47%), M7 150/301 (50%), M8 402/795 (51%), M9 128/412 (31%). Open PRs: 131. Session 4 active with 32 parallel workers.
 
 ### What Remains To Be Done
 
-The majority of the specification's domain models, services, CLI commands, and infrastructure modules are now implemented. M1 and M2 are fully complete. M3-M7 are the active development front with all milestones overdue. **Session 3 (Day 53, 2026-04-02) is active with 16 parallel workers and ~71 total agents**. 73+ PRs merged since session start. M8 (v3.7.0) is now **36% complete** (55/152 closed). M9 (v3.8.0) is **40% complete** (64/160 closed). Open bugs at **35** (up from 6 — UAT/bug-hunt wave). 79 open PRs need review and merge. The following areas still require completion:
+The majority of the specification's domain models, services, CLI commands, and infrastructure modules are now implemented. M1 and M2 are fully complete. M3-M7 are the active development front with all milestones overdue. **Session 4 (#4373, 2026-04-08) is active with 32 parallel workers**. M8 (v3.7.0) is now **51% complete** (402/795 closed). M9 (v3.8.0) is **31% complete** (128/412 closed). Open bugs at **~1445** (up from ~878 — +567 new TDD/integration test failure issues). 131 open PRs need review and merge. The following areas still require completion:
 
 - **Lingering `@tdd_expected_fail` tag cleanup (3 files)**:
   - \#647 (Container.resolve crash, M3) — TDD PR #670 still awaiting merge (Aditya). 5+ days in review.
@@ -2188,58 +2188,45 @@ Key constraints:
 
 **Goal**: Decisions are recorded during Strategize and Execute phases and persisted to the database. Users can view the decision tree (`plan tree`), inspect individual decisions (`plan explain`), manage invariants (`invariant add/list/remove`), and correct decisions (`plan correct --mode revert|append`) with selective subtree recomputation.
 
-**Current status**: **36 open / 236 total (85%).** 200 issues closed. Bugs largely resolved via CLI fix wave. All remaining bugs at Priority/Critical per policy. Open PRs targeting v3.2.0 need review and merge.
+**Current status**: **82 open / 317 total (74%).** 235 issues closed. Active Session 4 push. Open PRs targeting v3.2.0 need review and merge.
 
 **Key remaining work**:
 
-- **4 open bugs**: #647 (Container.resolve — TDD PR #1053 near merge), #620/#980 (skill add regression — TDD PR #1110 approved, fix PR #1120 reviewed), #797 (actor list DB — TDD #841 open, Priority escalated to Critical), #783 (init --yes — **STALLED**, TDD merged but bugfix not started, escalated to @aditya).
-- **TDD pipeline progress**: PR #1053 near merge (1 outstanding review). PR #1110 approved. Bug #783 stalled — escalation posted Day 43.
-- **M3 ETA: ~2026-04-10** (43 days past original target). 35 open issues remaining. Active PRs: #1185 (test fix), #1155 (TDD quality gate).
+- **82 open issues** across decisions, validations, invariants, and related bug fixes.
+- **M3 ETA: ~2026-04-20** (53 days past original target). 82 open issues remaining. Session 4 active with 32 parallel workers targeting M3 completion.
 
 #### Milestone 4: Corrections + Subplans + Checkpoints (Target: Mar 2, ETA: ~Mar 22)
 
 **Goal**: Plans can spawn child plans (subplans) during execution. Subplans execute in parallel with configurable concurrency limits. Results are merged back using three-way merge strategies. Correction engine supports revert and append modes. Checkpointing enables rollback to previous plan states.
 
-**Current status**: **25 open / 124 total (80%).** 99 issues closed. Active PRs targeting v3.3.0 need review and merge. Bug fixes largely resolved via CLI fix wave.
+**Current status**: **53 open / 161 total (67%).** 108 issues closed. Active Session 4 push. Open PRs targeting v3.3.0 need review and merge.
 
 **Key remaining work**:
 
-- **Bug #822 (checkpoint rollback)** — TDD #839 CLOSED. **Fix NOT STARTED.** Jeff must create `bugfix/m4-checkpoint-real-rollback` immediately.
-- **Bug #932 (plan apply --yes)** — TDD PR #958 needs rebase and merge. Fix assigned to Rui.
-- **3 new bugs without TDD**: #1023 (E2E init), #1024 (SQLite URL), #1025 (plan correct auto-resolve). TDD counterparts must be created.
-- Secret masking (#573, Luis — PR #656, merge conflict, no reviews)
-- M4 ETA: ~2026-03-22 (20 days past original target).
+- **53 open issues** across corrections, subplans, checkpoints, and related bug fixes.
+- M4 ETA: ~2026-04-22 (51 days past original target). Session 4 active targeting M4 completion.
 
 #### Milestone 5: ACMS v1 + Context Scaling (Target: Mar 6, ETA: ~Mar 22)
 
 **Goal**: The Advanced Context Management System v1 is operational. Projects with 10,000+ files can be indexed and queried. The context assembly pipeline produces scoped, budget-constrained context views for actors. Hot/warm/cold storage tiers manage context lifecycle.
 
-**Current status**: **16 open / 142 total (89%).** 126 issues closed. Active PRs targeting v3.4.0 need review and merge. Bug fixes largely resolved via CLI fix wave.
+**Current status**: **47 open / 177 total (73%).** 130 issues closed. Active Session 4 push. Open PRs targeting v3.4.0 need review and merge.
 
 **Key remaining work**:
 
-- **Bug #821 (ACMS tier service)** — TDD #840 (Brent) stalled 3+ days. Must be unblocked.
-- **Bug #1022 (InvariantService memory-only)** — **NO TDD. Needs creation.**
-- **Bug #1028 (ACMS pipeline wiring)** — TDD #1029 created (Rui). Not started.
-- ACMS context features (6 issues #846-#851, assigned to Aditya).
-- M5 E2E validation (PR #811 in review, 15 comments).
-- M5 ETA: ~2026-03-22 (16 days past original target).
+- **47 open issues** across ACMS v1, context scaling, and related bug fixes.
+- M5 ETA: ~2026-04-20 (45 days past original target). Session 4 active targeting M5 completion.
 
 #### Milestone 6: Autonomy Hardening (Target: Mar 10, ETA: ~Mar 14)
 
 **Goal**: The system can autonomously execute a large-scale task (e.g., porting a substantial codebase) using hierarchical plan decomposition with 4+ levels of subplans, decision correction with selective subtree recomputation, parallel execution scaling to 10+ concurrent subplans, and validation-gated apply. **Note**: Server stubs previously in this milestone have been moved to M9 (v3.8.0) following the ACP→A2A protocol adoption and server architecture redesign (ADR-047/048). TUI features moved to M8 (v3.7.0).
 
-**Current status**: **46 open / 214 total (79%).** 168 issues closed. Active PRs targeting v3.5.0 need review and merge. Bug fixes largely resolved via CLI fix wave. M6 advanced from 77% to 79% with end-of-day merges.
+**Current status**: **210 open / 396 total (47%).** 186 issues closed. Note: M6 total grew significantly (from ~327 to 396) due to new issues added by agents. Active Session 4 push. Open PRs targeting v3.5.0 need review and merge.
 
 **Key remaining work**:
 
-- **Bug #823 (subplan spawn)** — TDD #838 CLOSED (merged Day 36). **Fix NOT STARTED.** Jeff must create `bugfix/m6-subplan-spawn-orchestration`.
-- **8 untriaged bugs (#986-#993)** from PR #803 review — NO labels, milestones, assignees, or TDD. Must be triaged immediately.
-- **Estimation domain (Aditya)**: Cost estimation actor (#209, PR #528 — conflicted), EstimationReport model, YAML config.
-- **Event system (Luis)**: Fix-then-revalidate (#714, PR #711), event bus refinements.
-- **Output rendering (#550, Rui)**: PR #812 in round 3+ review (10 comments, security concerns, incomplete fixes pattern).
-- **CLI polish (#210, Brent)**, diagnostic dashboard (#580, Brent).
-- M6 ETA: ~2026-03-25 (15 days past original target).
+- **210 open issues** across autonomy hardening, server stubs, and related bug fixes. M6 total grew by ~69 new issues since Day 96.
+- M6 ETA: ~2026-05-15 (66 days past original target). Session 4 active targeting M6 completion.
 
 #### Milestone 7: Advanced Concepts & Deferred Features (v3.6.0, Target: Mar 28)
 
@@ -2265,9 +2252,9 @@ Key constraints:
 
 **Issues**: #694 (MainScreen, Jeff), #695 (Persona system, Aditya), #696 (TuiMaterializer, Jeff).
 
-**Current status**: **61% complete (36/59 issues closed), 23 open issues.** Active Session 3 push. Merged today: PermissionsScreen (#1307), actor thought blocks (#1298), session-driven editing (#1306), shell danger detection (#1284), session export/import (#1269, #1392), persona export/import (#1338), first-run experience (#1391), ACMS graph backend (#1282), Helm CI (#1267), E2E porting task (#1296), LLM actors wired (#1304), Prometheus metrics (#1308). Open PRs: MainScreen (#1302), TuiMaterializer A2A (#1294), Permission Question Widget (#1268), PostgreSQL backend (#1118), AWS CloudResource (#1280). Security bug-hunt: #1412, #1409, #1419.
+**Current status**: **51% complete (402/795 issues closed), 393 open issues.** Active Session 4 push. M8 total grew from 917 to 795 (net reduction due to issue restructuring). Open PRs targeting v3.7.0 need review and merge.
 
-**No deadline assigned.** Active development underway as part of Session 3 v3.7.0 push.
+**No deadline assigned.** Active development underway as part of Session 4 v3.7.0 push.
 
 #### Milestone 9: Server Implementation (v3.8.0, No Deadline)
 
@@ -2287,19 +2274,19 @@ Items without an assigned milestone represent backlog work to be addressed after
 
 ### Schedule Risk Summary
 
-As of Day 96 (2026-04-06), all milestones M3 through M7 are **overdue**. The original 7-8 day slippage has grown to **20+ days** for M3-M6. **Session 3 is active with 16 parallel workers (~71 total agents)**. Open PRs now at **108** (down from 183 — 75 PRs merged/closed!). Open bugs at **~878** (stable). M8 (v3.7.0) at **46% complete** (418/917 closed). M9 (v3.8.0) at **28% complete** (131/467 closed). Session tracker: #3775. Critical path: PR #3774 (Click 8.2+ fix) must be merged; 108 open PRs need review and merge; M3/M4/M5/M6/M7 all overdue; M8 at 46% with 499 issues remaining; ~878 open bugs need TDD counterparts and systematic triage.
+As of Day 98 (2026-04-08), all milestones M3 through M7 are **overdue**. The original 7-8 day slippage has grown to **20+ days** for M3-M6. **Session 4 is active (#4373)**. Open PRs now at **131**. Open bugs at **~1445** (up from ~878 — +567 new TDD/integration test failure issues). M8 (v3.7.0) at **51% complete** (402/795 closed). M9 (v3.8.0) at **31% complete** (128/412 closed). Session tracker: #4373. Critical path: 131 open PRs need review and merge; M3/M4/M5/M6/M7 all overdue; M8 at 51% with 393 issues remaining; ~1445 open bugs need TDD counterparts and systematic triage.
 
 **Day 50 planning actions (completed)**: (a) 2 reviewers assigned to all 20 open PRs. (b) Comments posted on #1154 and #1168 recommending closure. (c) Escalation comments on PRs with missing branches. (d) Issue #1206 created for `@tdd_expected_fail` tag cleanup. (e) Timeline updated with Day 50 schedule adherence entry.
 
 **Day 53 Session 3 actions**: (a) 16 parallel workers started. (b) 73+ PRs merged including ACMS UKO runtime (#1312), PermissionsScreen TUI (#1307), actor thought blocks (#1298), DatabaseResourceHandler (#1293), ACMS pipeline Phase 2 (#1287), DevcontainerHandler (#1286), async audit (#1279), serve CLI (#1272), LSP hover/definitions (#1240), domain event wiring (#1215), plan prompt command (#1212), M6 E2E tests (#1277), @tdd_expected_fail cleanup (#1229), persona export/import (#1338), first-run experience (#1391), session export/import (#1392). (c) UAT supervisor fleet (cycles 11-131) launched — discovered 100+ spec compliance bugs across CLI rich output, YAML config handling, and actor compiler. (d) Security bug-hunt PRs opened: #1412 (concurrency), #1409 (error handling), #1419 (hardcoded secrets). (e) Late-day: 4 more PRs merged (#1498, #1481, #1479, #1338), 18 new fix PRs opened (#1506-#1517) targeting UAT findings. (f) End-of-day CLI fix wave: 18 more PRs merged (#1574, #1573, #1570, #1569, #1567, #1566, #1565, #1563, #1562, #1558, #1556, #1554 and others) — open bugs reduced from **143 to 6**, open PRs at **74**.
 
 **Critical path blockers** (ranked):
-1. **PR #3774 must be fixed and merged** — Click 8.2+ compatibility fix with CI failures in push-validation and coverage. Blocks all milestone work.
-2. **108 open PRs need review** — significant reduction from 183 (75 PRs merged/closed on Day 96). Continued review velocity needed.
-3. **~878 open bugs need TDD counterparts** — agents created additional bugs throughout Days 54-95. Stable at ~878.
-4. **M3-M7 backlog** — 131+74+63+147+198 open issues across M3-M7. Progress made: M3 +4%, M4 +3%, M5 +4%.
-5. **M8 (v3.7.0) at 46%** — 499 issues remaining (milestone grew from 880→917). Continued agent-driven expansion.
-6. **M9 (v3.8.0) at 28%** — 336 issues remaining (milestone grew from 465→467). Continued expansion.
+1. **131 open PRs need review** — up from 108 on Day 96 (+23 new PRs). Continued review velocity needed.
+2. **~1445 open bugs need TDD counterparts** — surged from ~878 (+567 new TDD/integration test failure issues filed by agents on Day 98).
+3. **M3-M7 backlog** — 82+53+47+210+151 open issues across M3-M7. Progress made: M3 +9%, M4 +7%, M5 +5%, M7 +7%.
+4. **M6 regression** — M6 dropped from 55% to 47% due to 69+ new issues added to the milestone.
+5. **M8 (v3.7.0) at 51%** — 393 issues remaining (milestone restructured from 917→795). Continued agent-driven expansion.
+6. **M9 (v3.8.0) at 31%** — 284 issues remaining (milestone grew from 467→412 net). Continued expansion.
 
 **Spec changes impact assessment (Day 31)**: ACP→A2A rename affects 10 source files, 13 classes, 640+ test references across 22 files. Zero A2A code exists — migration not started. All open PRs that touch ACP modules will need additional rebase work after #688/#689 merge. TUI spec adds ~1,500 lines with 18 ASCII mockups defining Textual-based UI — PR #667 was a placeholder that predates this spec. Server architecture adopts JSON-RPC 2.0 standard — PR #676 used custom protocol, now obsolete.
 
@@ -5129,3 +5116,94 @@ Story points per developer per milestone.
 | M9 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~TBD SP |
 | M6+ | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~TBD SP |
 | **Total** | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~1649 SP |
+
+### 2026-04-08 (Day 98)
+
+**Summary**
+
+Status: Behind 20+d
+Deadline risk: HIGH
+
+**Notes**
+
+- Day 98 update (2026-04-08). Session 4 launched (issue #4373) with 32 parallel workers.
+- PR #4175 merged (fix: restore CI quality tests to passing state).
+- Bug count surged from ~878 to ~1445 (+567 new TDD/integration test failure issues filed by agents).
+- Milestone progress since Day 96 (2026-04-06): M3 65%→74% (235/317, +9%), M4 60%→67% (108/161, +7%), M5 68%→73% (130/177, +5%), M6 55%→47% (186/396, -8% due to 69+ new issues added), M7 43%→50% (150/301, +7%), M8 46%→51% (402/795, +5%), M9 28%→31% (128/412, +3%).
+- Milestone totals restructured significantly: M3 377→317 (-60 issues resolved/closed), M4 183→161 (-22), M5 199→177 (-22), M6 327→396 (+69 new issues added), M7 350→301 (-49), M8 917→795 (-122 net), M9 467→412 (-55 net).
+- Open PRs: 108→131 (+23 net new since Day 96). Open issues total: ~2359.
+- Session 3 closed. Session 4 active with 32 parallel workers.
+- All milestones M3-M7 remain overdue. M8 and M9 have no deadlines and are in active development.
+
+
+#### Milestone forecast
+
+| Milestone | Target -> ETA | Delta | Risk |
+|-----------|---------------|-------|------|
+| M1 (v3.0.0) | (2026-02-15) -> COMPLETE | 0d | COMPLETE |
+| M2 (v3.1.0) | (2026-02-22) -> COMPLETE | 0d | COMPLETE |
+| M3 (v3.2.0) | (2026-02-26) -> ETA 2026-04-20 | +53d | CRITICAL — 82 open issues; 74% complete (up from 65%) |
+| M4 (v3.3.0) | (2026-03-02) -> ETA 2026-04-22 | +51d | CRITICAL — 53 open issues; 67% complete (up from 60%) |
+| M5 (v3.4.0) | (2026-03-06) -> ETA 2026-04-20 | +45d | HIGH — 47 open issues; 73% complete (up from 68%) |
+| M6 (v3.5.0) | (2026-03-10) -> ETA 2026-05-15 | +66d | HIGH — 210 open issues; 47% complete (down from 55% — 69+ new issues added) |
+| M7 (v3.6.0) | (2026-03-28) -> ETA 2026-06-01 | +65d | HIGH — 151 open issues; 50% complete (up from 43%) |
+| M8 (v3.7.0) | (no deadline) -> ETA 2026-07-01 | N/A | HIGH — 393 open issues; 51% complete (up from 46%) |
+| M9 (v3.8.0) | (no deadline) -> ETA 2026-07-15 | N/A | MEDIUM — 284 open issues; 31% complete (up from 28%) |
+
+#### Track forecast
+
+| Track | Status | ETA | Risk | Blocking |
+|-------|--------|-----|------|----------|
+| Track A (Plan lifecycle + persistence) | Complete | Done | LOW | None |
+| Track B (Projects/resources + sandbox) | In Progress | ETA 2026-04-20 | MEDIUM | 47 open issues in v3.4.0; continued agent-driven expansion |
+| Track C (Actors/tools/skills/validations) | In Progress | ETA 2026-04-22 | CRITICAL | 53 open issues in v3.3.0; UAT spec compliance bugs ongoing |
+| Track D (Change tracking + apply pipeline) | In Progress | ETA 2026-04-20 | CRITICAL | 82 open issues in v3.2.0; M6 regression due to new issues |
+| Track Q (Quality automation) | Ongoing | N/A | HIGH | ~1445 open bugs; +567 new TDD/integration test failure issues filed |
+| Track T (Testing) | Active | Ongoing | HIGH | 131 open PRs need review; M6 regression requires attention |
+
+#### Developer forecast
+
+| Name | Days Ahead/Behind | Availability | Risk | Focus |
+|------|-------------------|--------------|------|-------|
+| Jeff | -22d behind | active | HIGH | Session 4 supervisor; M3/M4/M5 push; TUI architecture; M8 push |
+| Luis | -22d behind | active | HIGH | M6 (v3.5.0) features; security hardening; audit session; PR review pool |
+| Hamza | -22d behind | active | HIGH | Resource DAG; v3.6.0 features; AWS CloudResource; PR reviews |
+| Aditya | -22d behind | active | HIGH | M5 features; TDD counterparts; domain model work; UAT testing |
+| Brent | -22d behind | active | HIGH | Bug fixes; TDD counterparts; quality automation; ~1445 open bugs triage |
+| Rui | -22d behind | active | HIGH | TUI features; UAT bug fixes; security bug-hunt; E2E testing |
+| Mike/Brian | N/A | standby | LOW | Infrastructure support |
+
+#### Task inventory
+
+Milestone per developer as of Day 98 (2026-04-08).
+
+| Milestone | Jeff | Aditya | Luis | Hamza | Brent | Rui | Unassigned | Total |
+|-----------|------|--------|------|-------|-------|-----|------------|-------|
+| M1 | 29/29 | 16/16 | N/A | 4/4 | 10/10 | N/A | 35/35 | 96/96 |
+| M2 | 26/26 | 14/14 | N/A | 1/1 | 5/5 | N/A | 6/6 | 56/56 |
+| M3 | N/A | N/A | N/A | N/A | N/A | N/A | 82 open | 235/317 |
+| M4 | N/A | N/A | N/A | N/A | N/A | N/A | 53 open | 108/161 |
+| M5 | N/A | N/A | N/A | N/A | N/A | N/A | 47 open | 130/177 |
+| M6 | N/A | N/A | N/A | N/A | N/A | N/A | 210 open | 186/396 |
+| M7 | N/A | N/A | N/A | N/A | N/A | N/A | 151 open | 150/301 |
+| M8 | N/A | N/A | N/A | N/A | N/A | N/A | 393 open | 402/795 |
+| M9 | N/A | N/A | N/A | N/A | N/A | N/A | 284 open | 128/412 |
+| **Total** | **N/A** | **N/A** | **N/A** | **N/A** | **N/A** | **N/A** | **~1220 open** | **1435/2515 closed** |
+
+#### Story point allocation
+
+Story points per developer per milestone.
+
+| Milestone | Jeff | Aditya | Luis | Hamza | Brent | Rui | Unassigned | Total |
+|-----------|------|--------|------|-------|-------|-----|------------|-------|
+| M1 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~172 SP |
+| M2 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~208 SP |
+| M3 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~104 SP |
+| M4 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~126 SP |
+| M5 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~129 SP |
+| M6 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~151 SP |
+| M7 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~100 SP |
+| M8 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~TBD SP |
+| M9 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~TBD SP |
+| M6+ | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~TBD SP |
+| **Total** | N/A | N/A | N/A | N/A | N/A | N/A | N/A | ~1649 SP |