docs: update v0.3.0 release notes for Phase 2-4

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: JiaboLi-GitHub

release-notes/v0.3.0.md

@@ -1,33 +1,45 @@
-# v0.3.0 — Phase 2: Shader Editing, Extended Export, CI Assertions
+# v0.3.0 — Phase 2-4: Shader Editing, Diff Engine, Pass Analysis
 
-**Date:** 2026-04-01
+**Date:** 2026-04-02
 
 ## Highlights
 
-- **40 MCP tools** (13 new in Phase 2)
-- Shader hot-editing: compile, replace, and restore shaders at runtime
-- Mesh export: OBJ/JSON vertex data from draw calls
-- Draw snapshots: export complete rendering state in one call
-- Resource usage tracking: see how resources are used across events
-- CI assertions: automated validation of pixel values, pipeline state, images, counts, and debug messages
+- **52 MCP tools** (25 new since v0.2.x)
+- Phase 2: Shader hot-editing, mesh/snapshot export, CI assertions (13 tools)
+- Phase 3: Dual-capture diff engine with 6 comparison modes (8 tools)
+- Phase 4: Pass-level analysis with dependency DAG and unused RT detection (4 tools)
 
-## New Tools
+## Phase 2: Shader Editing, Extended Export, CI Assertions (13 tools)
 
 ### Shader Hot-Editing
-- `shader_encodings` — List supported shader compilation encodings
-- `shader_build` — Compile shader source code
-- `shader_replace` — Replace shader at event/stage
-- `shader_restore` — Restore single shader
-- `shader_restore_all` — Restore all shaders
+- `shader_encodings` / `shader_build` / `shader_replace` / `shader_restore` / `shader_restore_all`
 
 ### Extended Export
-- `export_mesh` — Export post-transform vertex data as OBJ or JSON
-- `export_snapshot` — Export complete draw state (pipeline + shaders + render targets)
-- `get_resource_usage` — Query resource usage across all events
+- `export_mesh` — OBJ/JSON vertex data
+- `export_snapshot` — Complete draw state bundle
+- `get_resource_usage` — Resource usage across events
 
 ### CI Assertions
-- `assert_pixel` — Validate pixel RGBA with tolerance
-- `assert_state` — Validate pipeline state fields
-- `assert_image` — Compare PNG images pixel-by-pixel
-- `assert_count` — Validate resource/event/draw counts
-- `assert_clean` — Validate no debug messages above severity
+- `assert_pixel` / `assert_state` / `assert_image` / `assert_count` / `assert_clean`
+
+## Phase 3: Diff Engine (8 tools)
+
+Dual-capture comparison with LCS-aligned draw matching:
+- `diff_open` / `diff_close` / `diff_summary` / `diff_draws`
+- `diff_resources` / `diff_stats` / `diff_pipeline` / `diff_framebuffer`
+
+**CLI:** `renderdoc-cli diff FILE_A FILE_B [--draws|--resources|--stats|--pipeline|--framebuffer]`
+
+## Phase 4: Pass-Level Analysis (4 tools)
+
+Hybrid pass enumeration (marker + synthetic gap-fill):
+- `get_pass_attachments` — Color/depth attachment query
+- `get_pass_statistics` — Per-pass draw/triangle/RT stats
+- `get_pass_deps` — Inter-pass resource dependency DAG
+- `find_unused_targets` — Dead render target detection with wave ranking
+
+**CLI:** `pass-stats` / `pass-deps` / `unused-targets`
+
+## Notes
+- Windows x64 only
+- Requires RenderDoc v1.43+ runtime (bundled in release packages)