diff --git a/docs/milestones/M08/M08_audit.md b/docs/milestones/M08/M08_audit.md
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@@ -0,0 +1,71 @@
+# M08 Audit — Opts Snapshot Threading
+
+**Milestone:** M08  
+**Title:** Opts snapshot threading  
+**Branch:** m08-snapshot-threading  
+**Audit date:** 2026-03-12  
+**Mode:** DELTA AUDIT  
+**Range:** 8ea50d35 (M07) → 710a0abd (M08 merge)  
+**CI Status:** Green (Quality 22984445599)  
+**Refactor Posture:** Behavior-Preserving  
+**Audit Verdict:** 🟢 Milestone objectives met. Runtime now reads from p.opts_snapshot for save-related settings. Proceed to M09.
+
+---
+
+## 1. Executive Summary
+
+M08 successfully threaded p.opts_snapshot into process_images_inner for safe read-only option access, establishing the fourth Phase II runtime seam.
+
+**Wins:**
+* Migrated 12 save-related opts reads from shared.opts to p.opts_snapshot
+* Limited blast radius to process_images_inner only; save_samples(), sample_hr_pass(), metadata logic unchanged
+* Same inputs → same outputs; no behavior drift
+* txt2img and img2img smoke tests exercise the critical path
+* Quality Tests pass; coverage ≥40%; verify_pinned_deps ✓
+
+**Risks:** None identified.
+
+**Next action:** Proceed to M09 (execution context seam).
+
+---
+
+## 2. CI Evidence
+
+| Check | Result |
+|-------|--------|
+| Smoke Tests (PR #24) | 22984306614 ✓ |
+| Linter (PR #24) | 22984306617 ✓ |
+| Quality Tests (post-merge) | 22984445599 ✓ |
+| Coverage | ≥40% gate satisfied |
+| verify_pinned_deps | ✓ Passed |
+| pip-audit | Informational (M27) |
+| Artifacts | coverage.xml ✓, ci_environment ✓ |
+
+---
+
+## 3. Delta Map & Blast Radius
+
+| Changed | Impact |
+|---------|--------|
+| modules/processing.py | Modified — p.opts_snapshot for save-related reads in process_images_inner |
+| docs/milestones/M08/* | Plan, toolcalls, run reports |
+
+**Blast radius:** process_images_inner image/grid saving logic only. No API/CLI/schema changes. Extensions continue reading shared.opts; save_samples() and sample_hr_pass() unchanged per M08 scope.
+
+---
+
+## 4. Category Scores
+
+| Category | Score | Notes |
+|----------|-------|-------|
+| Refactor discipline | 5 | Scope respected; no creep |
+| Behavior preservation | 5 | No runtime drift; smoke + quality pass |
+| Test coverage | 5 | Existing smoke tests cover critical path |
+| CI integrity | 5 | All gates green |
+| **Overall** | **5.0** | |
+
+---
+
+## 5. Verdict
+
+Milestone objectives met. Runtime begins reading from p.opts_snapshot for save-related config. Fourth Phase II seam; enables M09 execution context and ProcessingRunner architecture (M10+).
diff --git a/docs/milestones/M08/M08_run2.md b/docs/milestones/M08/M08_run2.md
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@@ -0,0 +1,60 @@
+# M08 CI Run 2 — Post-Merge Quality Verification
+
+**Date:** 2026-03-12  
+**Branch:** main (post-merge)  
+**Merge commit:** 710a0abd  
+**Trigger:** push (Merge PR #24)
+
+---
+
+## 1. Workflow Identity
+
+| Workflow | Run ID | Trigger | Branch | Commit | Status |
+|----------|--------|---------|--------|--------|--------|
+| Quality Tests | **22984445599** | push | main | 710a0abd | ✓ success |
+| Linter | 22984445598 | push | main | 710a0abd | ✓ success |
+
+---
+
+## 2. Quality Tests (22984445599)
+
+| Job / Step | Required? | Purpose | Pass/Fail |
+|------------|-----------|---------|-----------|
+| Verify repository | Yes | Guardrail: m-cahill/serena only | ✓ |
+| Verify ref | Yes | Guardrail: push to main | ✓ |
+| Checkout Code | Yes | Fetch merge commit | ✓ |
+| Set up Python 3.10 | Yes | Runtime | ✓ |
+| Cache models | Yes | Deterministic model path | ✓ |
+| Install dependencies | Yes | torch, CLIP, requirements_versions | ✓ |
+| pip-audit | Informational | Dependency vuln scan | ⚠ (deferred M27) |
+| verify_pinned_deps | Yes | Pinned deps enforcement | ✓ |
+| Create stub repositories | Yes | CI fake inference | ✓ |
+| Setup environment | Yes | launch.py --exit | ✓ |
+| Start test server | Yes | Live server for API tests | ✓ |
+| **Run quality tests** | **Yes** | **pytest test** (coverage ≥40%) | **✓** |
+| Kill test server | Yes | Cleanup | ✓ |
+| Show coverage | Yes | --fail-under=40 | ✓ |
+| Upload artifacts | No (always) | coverage.xml, htmlcov, output | ✓ |
+
+**Duration:** 3m25s
+
+**Annotation:** pip-audit found vulnerabilities. Remediation deferred to M27. See M04_audit.md.
+
+---
+
+## 3. CI Confirmation
+
+| Check | Status |
+|-------|--------|
+| Quality Tests | ✓ |
+| Coverage | ≥ 40% |
+| pip-audit | Informational (M27) |
+| verify_pinned_deps | ✓ |
+
+---
+
+## 4. Verdict
+
+**CI Status:** Green
+
+All gates passed. M08 closeout verified. Ready for audit and summary generation.
diff --git a/docs/milestones/M08/M08_summary.md b/docs/milestones/M08/M08_summary.md
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index 000000000..a7b8d7af2
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+++ b/docs/milestones/M08/M08_summary.md
@@ -0,0 +1,59 @@
+# M08 Summary — Opts Snapshot Threading
+
+**Project:** Serena  
+**Phase:** Phase II — Runtime Seam Preparation  
+**Milestone:** M08 — Opts snapshot threading  
+**Status:** Closed  
+**Branch:** m08-snapshot-threading  
+**PR:** #24  
+**Commit:** 710a0abd (merge)  
+**Quality Run:** 22984445599 ✓
+
+---
+
+## Accomplished
+
+| Item | Status |
+|------|--------|
+| Migrated save-related opts reads to p.opts_snapshot in process_images_inner | ✓ |
+| save_images_before_face_restoration, save_images_before_color_correction | ✓ |
+| samples_format, return_mask, save_mask, return_mask_composite, save_mask_composite | ✓ |
+| grid_only_if_multiple, return_grid, grid_save, grid_format, grid_extended_filename | ✓ |
+| Left save_samples(), sample_hr_pass(), create_infotext(), metadata on shared.opts | ✓ |
+| Preserved behavior (same inputs → same outputs) | ✓ |
+| Extension compatibility preserved | ✓ |
+
+---
+
+## CI Layout After M08
+
+| Workflow | Trigger | Coverage | Security |
+|----------|---------|----------|----------|
+| Smoke Tests | pull_request (main) | No gate | None |
+| Linter | pull_request | — | — |
+| Quality Tests | push to main | ≥40% | pip-audit (informational) |
+
+---
+
+## Invariants Preserved
+
+- Generation behavior unchanged
+- File output behavior (save paths, naming) unchanged
+- Extension compatibility (shared.opts still exists)
+- API compatibility (txt2img/img2img)
+- CLI behavior unchanged
+
+---
+
+## Blast Radius
+
+| File | Change |
+|------|--------|
+| modules/processing.py | Modified — p.opts_snapshot for save-related reads |
+| docs/milestones/M08/* | Plan, toolcalls, run reports |
+
+---
+
+## Refactor Result
+
+First deterministic runtime boundary: generation pipeline now reads save-related config from p.opts_snapshot instead of shared.opts within process_images_inner. Fourth Phase II runtime seam; enables M09 execution context and ProcessingRunner architecture (M10+).
diff --git a/docs/milestones/M09/M09_plan.md b/docs/milestones/M09/M09_plan.md
new file mode 100644
index 000000000..34795560a
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+++ b/docs/milestones/M09/M09_plan.md
@@ -0,0 +1,3 @@
+# M09 Plan — Execution Context Seam
+
+(To be populated.)
diff --git a/docs/milestones/M09/M09_toolcalls.md b/docs/milestones/M09/M09_toolcalls.md
new file mode 100644
index 000000000..1c2f1f788
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+++ b/docs/milestones/M09/M09_toolcalls.md
@@ -0,0 +1,5 @@
+# M09 Toolcalls — Execution Context Seam
+
+Implementation toolcalls for Cursor execution.
+
+(To be filled during milestone execution.)
diff --git a/docs/serena.md b/docs/serena.md
index a571f8d10..47091ab8a 100644
--- a/docs/serena.md
+++ b/docs/serena.md
@@ -137,6 +137,7 @@ Core principles:
 | M05 | Override isolation / temporary opts seam | Completed | m05-override-isolation | #18 (+ #19 fix) | ae161cbb | Quality 22888808682 ✓ | 5.0 / 5 | 2026-03-10 |
 | M06 | Prompt/seed prep extraction | Completed | m06-prompt-seed-prep | #20 | 6744152a | Quality 22890285319 ✓ | 5.0 / 5 | 2026-03-10 |
 | M07 | Opts snapshot introduction | Completed | m07-opts-snapshot | #22 | 8ea50d35 | Quality 22983583947 ✓ | 5.0 / 5 | 2026-03-12 |
+| M08 | Opts snapshot threading | Completed | m08-snapshot-threading | #24 | 710a0abd | Quality 22984445599 ✓ | 5.0 / 5 | 2026-03-12 |
 
 **M05:** Introduced `temporary_opts()` context manager — first Phase II runtime seam. Isolates override_settings mutation from global `shared.opts`; preserves behavior (opts.set, setattr restore, k in opts.data). Model/VAE reload and token merging remain in process_images. Enables future opts snapshot injection (M07).
 
@@ -144,6 +145,8 @@ Core principles:
 
 **M07:** Introduced `create_opts_snapshot(opts)` in `modules/opts_snapshot.py`. Third Phase II runtime seam. Captures deterministic snapshot of opts.data in process_images_inner after prepare_prompt_seed_state; stored on p.opts_snapshot. Write-only in M07; enables M08 snapshot threading.
 
+**M08:** Threaded p.opts_snapshot into process_images_inner for save-related reads. Fourth Phase II runtime seam. Migrated 12 opts (save_images_before_face_restoration, samples_format, grid_save, etc.) from shared.opts to p.opts_snapshot. save_samples(), sample_hr_pass(), metadata unchanged. Enables M09 execution context.
+
 ---
 
 ## 5. Standing Invariants