diff --git a/docs/timeline.md b/docs/timeline.md
index e9a3b5316..2ded084c4 100644
--- a/docs/timeline.md
+++ b/docs/timeline.md
@@ -10,25 +10,24 @@ The following chart shows all 29 epics across 9 legendary workstreams, 7 milesto
 @startgantt
 
 title CleverAgents Core — Epic-Level Project Schedule
-footer Generated 2026-04-08 | 29 Epics | 9 Legendaries | 7 Milestones | 6 Developers | ~1650 SP | ~878 open bugs | 1 open PR | Session 4 active
+footer Generated 2026-04-09 | 29 Epics | 9 Legendaries | 7 Milestones | 6 Developers | ~1650 SP | ~3113 open bugs | 50 open PRs | Session 4 active
 
 Project starts 2026-02-03
 saturday are closed
 sunday are closed
 printscale weekly zoom 2
 
-today is 2026-04-08
+today is 2026-04-09
 today is colored in #FF6666
 
 ' ================================================================
-'  GANTT CHART UPDATE LOG (Day 98 — 2026-04-08)
-'  Changes: Day 98 refresh. New build session #4799 launched 2026-04-08.
-'  Open PRs: 108→1 (massive merge wave). Open bugs: ~878 (stable).
-'  M3 73% (235/320), M4 67% (108/161), M5 71% (130/183), M6 29% (188/638, scope expanded!),
-'  M7 48% (150/312), M8 47% (403/855).
-'  Progress since Day 96: M3 +8%, M4 +7%, M5 +3%, M7 +5%, M8 +1%.
-'  M6 scope expanded massively: 327→638 total issues (+311 new issues added).
-'  Session 4 active. Session tracker issue: #4799.
+'  GANTT CHART UPDATE LOG (Day 99 — 2026-04-09)
+'  Changes: Day 99 refresh. Session 4 active (issue #4799), 32 parallel workers.
+'  Open PRs: 1→50 (+49 new PRs opened by agents). Open bugs: ~878→~3113 (+2235 new UAT bugs!).
+'  M3 54% (245/455), M4 54% (108/199), M5 60% (130/215), M6 20% (193/989, scope expanded +351!),
+'  M7 43% (150/347), M8 46% (422/925), M9 29% (129/440).
+'  Massive scope expansion across all milestones due to agent-driven issue creation.
+'  Bug count tripled: ~878→~3113 (UAT pool filing bugs at high velocity).
 ' ================================================================
 
 <style>
@@ -1965,13 +1964,13 @@ This section provides a high-level overview of the CleverAgents implementation r
 
 ### Current Status Summary
 
-As of Day 98 (2026-04-08), the project has **1 open PR** (down from 108 — massive merge wave!) and **~1458 open issues** across active milestones. **Session 4 is active (launched 2026-04-08, issue #4799) with 32 parallel workers and full supervisor fleet**. Bug count is **~878 open bugs** (stable). M8 (v3.7.0) is now **47% complete** (403/855 issues closed). M3 (v3.2.0) at **73%** (235/320), M4 (v3.3.0) at **67%** (108/161), M5 (v3.4.0) at **71%** (130/183), M6 (v3.5.0) at **29%** (188/638 — scope massively expanded from 327 to 638 issues), M7 (v3.6.0) at **48%** (150/312).
+As of Day 99 (2026-04-09), the project has **50 open PRs** (up from 1 — agents opened 49 new PRs) and **~2193 open issues** across active milestones. **Session 4 is active (launched 2026-04-08, issue #4799) with 32 parallel workers and full supervisor fleet**. Bug count is **~3,113 open bugs** (up from ~878 — UAT pool filing bugs at very high velocity). M8 (v3.7.0) is now **46% complete** (422/925 issues closed). M3 (v3.2.0) at **54%** (245/455), M4 (v3.3.0) at **54%** (108/199), M5 (v3.4.0) at **60%** (130/215), M6 (v3.5.0) at **20%** (193/989 — scope massively expanded from 638 to 989 issues), M7 (v3.6.0) at **43%** (150/347), M9 (v3.8.0) at **29%** (129/440).
 
-**M1, M2 fully complete. M3 (v3.2.0)**: 73% complete (235/320), 85 open issues. **M4 (v3.3.0)**: 67% complete (108/161), 53 open issues. **M5 (v3.4.0)**: 71% complete (130/183), 53 open issues. **M6 (v3.5.0)**: 29% complete (188/638), 450 open issues — scope expanded massively (+311 new issues). **M7 (v3.6.0)**: 48% complete (150/312), 162 open issues. **M8 (v3.7.0)**: 47% complete (403/855), 452 open issues. All milestones M3-M7 are **overdue**; M8 is in active v3.7.0 development.
+**M1, M2 fully complete. M3 (v3.2.0)**: 54% complete (245/455), 210 open issues. **M4 (v3.3.0)**: 54% complete (108/199), 91 open issues. **M5 (v3.4.0)**: 60% complete (130/215), 85 open issues. **M6 (v3.5.0)**: 20% complete (193/989), 796 open issues — scope expanded massively (+351 new issues since Day 98). **M7 (v3.6.0)**: 43% complete (150/347), 197 open issues. **M8 (v3.7.0)**: 46% complete (422/925), 503 open issues. **M9 (v3.8.0)**: 29% complete (129/440), 311 open issues. All milestones M3-M7 are **overdue**; M8/M9 are in active development.
 
-!!! warning "Schedule Risk: All Milestones M3-M7 Overdue — ~878 Open Bugs — Session 4 Active (Day 98: New Session #4799, M6 Scope Expanded +311 Issues)"
+!!! warning "Schedule Risk: All Milestones M3-M7 Overdue — ~3,113 Open Bugs — Session 4 Active (Day 99: Bug Count Tripled, M6 Scope Expanded +351 Issues)"
 
-    All milestones M3 through M7 have passed their target dates. **Session 4 launched 2026-04-08 with 32 parallel workers**. Open PRs at **1** (down from 108 — massive merge wave). Open bugs at **~878** (stable). Session tracker issue: #4799. **Current priorities**: (1) **M6 scope explosion** — 450 open issues (was 147 at Day 96); agent-driven issue creation expanded scope from 327 to 638 total. (2) **Triage ~878 open bugs** — systematic review required. (3) **Continue M8 push** — 47% complete, 452 issues remaining. (4) **Clear M3/M4/M5 backlogs** — M3 at 73% (85 open), M4 at 67% (53 open), M5 at 71% (53 open).
+    All milestones M3 through M7 have passed their target dates. **Session 4 active (launched 2026-04-08, issue #4799) with 32 parallel workers**. Open PRs at **50** (up from 1 — agents opened 49 new PRs). Open bugs at **~3,113** (tripled from ~878 — UAT pool filing bugs at very high velocity). Session tracker issue: #4799. **Current priorities**: (1) **Bug triage crisis** — ~3,113 open bugs (was ~878 at Day 98); UAT pool is discovering spec compliance issues at very high velocity. (2) **M6 scope explosion** — 796 open issues (was 450 at Day 98); scope expanded from 638 to 989 total. (3) **Continue M8/M9 push** — M8 at 46% (503 open), M9 at 29% (311 open). (4) **Clear M3/M4/M5 backlogs** — M3 at 54% (210 open), M4 at 54% (91 open), M5 at 60% (85 open).
 
 ### Parallel Workstreams
 
@@ -5223,3 +5222,97 @@ 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 |
+
+### 2026-04-09 (Day 99)
+
+**Summary**
+
+Status: Behind 20+d
+Deadline risk: CRITICAL
+
+**Notes**
+
+- Day 99 update (2026-04-09). Session 4 remains active (issue #4799) with 32 parallel workers and full supervisor fleet.
+- Open PRs grew from 1 to 50 (+49 new PRs opened by agents across docs, spec, fix, and feat categories).
+- Open bugs tripled: ~878 → ~3,113 (+2,235 new UAT bugs). UAT pool supervisor is filing spec compliance issues at very high velocity.
+- Milestone scope expanded significantly across all milestones due to agent-driven issue creation: M3 (320→455, +135), M4 (161→199, +38), M5 (183→215, +32), M6 (638→989, +351), M7 (312→347, +35), M8 (855→925, +70), M9 (N/A→440 total).
+- Milestone completions (Day 99): M3 54% (245/455), M4 54% (108/199), M5 60% (130/215), M6 20% (193/989), M7 43% (150/347), M8 46% (422/925), M9 29% (129/440).
+- Apparent completion percentages dropped across M3-M8 due to scope expansion outpacing closures: M3 73%→54%, M4 67%→54%, M5 71%→60%, M6 29%→20%, M7 48%→43%, M8 47%→46%.
+- Critical UAT bugs filed include: #5467 (GRAPH actor subgraph nodes stub-only — Critical), #5479 (GitWorktreeSandbox merge conflict not surfaced — Critical), #5489 (E2E test missing plan diff step — Critical), #5506 (ToolRunner falls through to host on CONTAINER_REF — Critical), and 2,200+ additional UAT spec compliance bugs.
+- All milestones M3-M7 remain overdue. M8 and M9 have no deadlines and are in active development.
+- 50 open PRs include multiple timeline update attempts (PRs #5448, #5214, #5185, #5085) and feature/fix PRs (#5271 ACMS ProjectIndexer, #5276 context settings defaults, #5286 orchestrator scaling to 32 workers).
+
+
+#### 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 2026-05-15 | +78d | CRITICAL — 210 open issues; 54% complete (scope expanded 320→455) |
+| M4 (v3.3.0) | (2026-03-02) -> ETA 2026-05-18 | +77d | CRITICAL — 91 open issues; 54% complete (scope expanded 161→199) |
+| M5 (v3.4.0) | (2026-03-06) -> ETA 2026-05-15 | +70d | HIGH — 85 open issues; 60% complete (scope expanded 183→215) |
+| M6 (v3.5.0) | (2026-03-10) -> ETA 2026-08-01 | +144d | CRITICAL — 796 open issues; 20% complete (scope expanded 638→989) |
+| M7 (v3.6.0) | (2026-03-28) -> ETA 2026-06-15 | +79d | HIGH — 197 open issues; 43% complete (scope expanded 312→347) |
+| M8 (v3.7.0) | (no deadline) -> ETA 2026-07-20 | N/A | HIGH — 503 open issues; 46% complete (scope expanded 855→925) |
+| M9 (v3.8.0) | (no deadline) -> ETA 2026-08-10 | N/A | MEDIUM — 311 open issues; 29% complete |
+
+#### Track forecast
+
+| Track | Status | ETA | Risk | Blocking |
+|-------|--------|-----|------|----------|
+| Track A (Plan lifecycle + persistence) | Complete | Done | LOW | None |
+| Track B (Projects/resources + sandbox) | In Progress | ETA 2026-05-15 | HIGH | 85 open issues in v3.4.0; UAT bugs #5479 (sandbox merge conflict), #5482 (resource remove no link check) |
+| Track C (Actors/tools/skills/validations) | In Progress | ETA 2026-05-18 | CRITICAL | 91 open issues in v3.3.0; UAT bugs #5467 (GRAPH subgraph stub), #5475 (actor version field), #5471 (missing LLM fields) |
+| Track D (Change tracking + apply pipeline) | In Progress | ETA 2026-05-15 | CRITICAL | 210 open issues in v3.2.0; scope expanded +135 new issues; #5489 (E2E missing plan diff) |
+| Track Q (Quality automation) | Ongoing | N/A | CRITICAL | ~3,113 open bugs (tripled from ~878); UAT pool filing at very high velocity |
+| Track T (Testing) | Active | Ongoing | HIGH | 50 open PRs need review; #5506 (ToolRunner CONTAINER_REF fallthrough) critical |
+
+#### Developer forecast
+
+| Name | Days Ahead/Behind | Availability | Risk | Focus |
+|------|-------------------|--------------|------|-------|
+| Jeff | -24d behind | active | HIGH | Session 4 supervisor; M3/M4/M5 backlog clearance; architecture oversight; 50 open PRs |
+| Luis | -24d behind | active | HIGH | M6 (v3.5.0) features; security hardening; PR review pool; UAT bug triage |
+| Hamza | -24d behind | active | HIGH | Resource DAG; v3.6.0 features; AWS CloudResource; UAT bug fixes (#5479, #5482) |
+| Aditya | -24d behind | active | HIGH | M5 features; TDD counterparts; domain model work; ACMS ProjectIndexer (#5271) |
+| Brent | -24d behind | active | HIGH | Bug fixes; TDD counterparts; quality automation; ~3,113 open bugs triage |
+| Rui | -24d 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 99 (2026-04-09).
+
+| 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 | 210 open | 245/455 |
+| M4 | N/A | N/A | N/A | N/A | N/A | N/A | 91 open | 108/199 |
+| M5 | N/A | N/A | N/A | N/A | N/A | N/A | 85 open | 130/215 |
+| M6 | N/A | N/A | N/A | N/A | N/A | N/A | 796 open | 193/989 |
+| M7 | N/A | N/A | N/A | N/A | N/A | N/A | 197 open | 150/347 |
+| M8 | N/A | N/A | N/A | N/A | N/A | N/A | 503 open | 422/925 |
+| M9 | N/A | N/A | N/A | N/A | N/A | N/A | 311 open | 129/440 |
+| **Total** | **N/A** | **N/A** | **N/A** | **N/A** | **N/A** | **N/A** | **~2193 open** | **1473/3666 closed** |
+
+Note: "done/total" = closed/total for that milestone. Assignee data reflects Forgejo API as of Day 99 (2026-04-09). Most open issues are unassigned or assigned to freemo (Jeff). Agent-driven issue creation continues at very high velocity across all milestones. Scope expanded significantly: M3 (+135), M4 (+38), M5 (+32), M6 (+351), M7 (+35), M8 (+70), M9 (new: 440 total). Open bugs tripled from ~878 to ~3,113 due to UAT pool filing spec compliance issues at high velocity.
+
+#### 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 | ~TBD 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 |