diff --git a/CHANGELOG.md b/CHANGELOG.md
index b391a59..03b5a61 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,43 @@
 
 All notable changes to this project will be documented in this file. See [commit-and-tag-version](https://github.com/absolute-version/commit-and-tag-version) for commit guidelines.
 
+## [3.1.0](https://github.com/optave/codegraph/compare/v3.0.4...v3.1.0) (2026-03-08)
+
+**Sequence diagrams, native engine performance leap, and unused export detection.** This release adds `codegraph sequence` for Mermaid sequence diagram generation from call graph edges, delivers major native engine build optimizations (deep-clone elimination, batched SQLite inserts, call edge building in Rust, FS caching, rayon-parallel import resolution), introduces `--unused` on the exports command to detect dead exports, and fixes an ~80x native no-op rebuild regression.
+
+### Features
+
+* **sequence:** add `codegraph sequence <name>` command for Mermaid sequence diagram generation from call graph edges — participants are files, BFS forward from entry point, optional `--dataflow` flag for parameter/return annotations; exposed via CLI, MCP tool, and programmatic API ([#345](https://github.com/optave/codegraph/pull/345))
+* **exports:** add `--unused` flag to `codegraph exports` — new `exported` column (migration v14) populated from parser export declarations, enabling detection of symbols declared as exports but with zero consumers ([#361](https://github.com/optave/codegraph/pull/361))
+
+### Performance
+
+* **native:** eliminate deep-clone in `normalizeNativeSymbols` — replace 125-line JS deep-clone with in-place `patchNativeResult` via `#[napi(js_name)]` annotations on Rust types ([#361](https://github.com/optave/codegraph/pull/361))
+* **native:** add `include_ast_nodes` flag to `parse_file`/`parse_files` — initial parse skips AST node walking, saving ~200ms ([#361](https://github.com/optave/codegraph/pull/361))
+* **native:** move call/receiver/extends edge building to Rust (`edge_builder.rs`) — narrowest-span caller resolution, confidence sorting, dedup via u64 edge keys ([#361](https://github.com/optave/codegraph/pull/361))
+* **native:** add `known_files` HashSet cache to `resolve_imports_batch` — avoids redundant FS syscalls during import resolution ([#361](https://github.com/optave/codegraph/pull/361))
+* **native:** parallelize `resolve_imports_batch` with rayon for concurrent import resolution ([#361](https://github.com/optave/codegraph/pull/361))
+* **builder:** batch SQLite multi-value INSERTs — accumulate node/edge rows and flush with chunked INSERT statements (200 rows per chunk) instead of individual prepared statement runs ([#361](https://github.com/optave/codegraph/pull/361))
+
+### Bug Fixes
+
+* **native:** fix no-op rebuild regression (~80x slower than WASM) — `extToLang` map was not built when native engine provided pre-computed CFG, causing `langId` lookup to return null and triggering full re-parse on every incremental build ([#360](https://github.com/optave/codegraph/pull/360))
+* **native:** pass full file list to `known_files` cache — on incremental builds only changed files were passed, causing valid import targets to be dropped ([#361](https://github.com/optave/codegraph/pull/361))
+* **benchmark:** install native package explicitly in npm benchmark mode ([#351](https://github.com/optave/codegraph/pull/351))
+
+### Documentation
+
+* reorder README to be AI-first throughout ([#362](https://github.com/optave/codegraph/pull/362))
+* add MCP tool surface optimization proposal ([#363](https://github.com/optave/codegraph/pull/363))
+* update build performance, query, and incremental benchmarks for 3.0.4 ([#352](https://github.com/optave/codegraph/pull/352), [#353](https://github.com/optave/codegraph/pull/353), [#354](https://github.com/optave/codegraph/pull/354))
+
+### Chores
+
+* **deps:** bump graphology from 0.25.4 to 0.26.0 ([#358](https://github.com/optave/codegraph/pull/358))
+* **deps-dev:** bump @biomejs/biome from 2.4.4 to 2.4.6 ([#359](https://github.com/optave/codegraph/pull/359))
+* **deps-dev:** bump @commitlint/cli from 20.4.2 to 20.4.3 ([#357](https://github.com/optave/codegraph/pull/357))
+* **deps-dev:** bump @commitlint/config-conventional ([#355](https://github.com/optave/codegraph/pull/355))
+
 ## [3.0.4](https://github.com/optave/codegraph/compare/v3.0.3...v3.0.4) (2026-03-05)
 
 **Native engine goes full-stack: CFG, AST nodes, and WASM double-parse elimination.** This release completes the native engine migration — CFG computation and AST node extraction now run in Rust for 8 languages, eliminating the redundant WASM pre-parse on native builds.
diff --git a/README.md b/README.md
index 2e490cd..937b781 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@
 
 AI agents are the primary interface to large codebases — and they're flying blind.
 
-An agent burns half its token budget on `grep`, `find`, `cat` — re-discovering the same structure every session. It modifies `parseConfig()` without knowing 9 files import it. It hallucinates a function signature because it never saw the real one. Multiply that by every session, every developer, every repo.
+An agent burns a great portion of its token budget on `grep`, `find`, `cat` — re-discovering the same structure every session. It modifies `parseConfig()` without knowing 9 files import it. It hallucinates a function signature because it never saw the real one. Multiply that by every session, every developer, every repo.
 
 Developers aren't much better off. They inherit projects and spend days grepping to understand what calls what. Architects draw boundary rules that erode within weeks because nothing enforces them. CI catches test failures but can't tell you _"this change silently affects 14 callers across 9 files."_
 
diff --git a/crates/codegraph-core/Cargo.toml b/crates/codegraph-core/Cargo.toml
index 9bd54f9..f2baa27 100644
--- a/crates/codegraph-core/Cargo.toml
+++ b/crates/codegraph-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "codegraph-core"
-version = "3.0.4"
+version = "3.1.0"
 edition = "2021"
 license = "Apache-2.0"
 
diff --git a/package-lock.json b/package-lock.json
index aacdaf0..6b1ef3d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@optave/codegraph",
-  "version": "3.0.4",
+  "version": "3.1.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@optave/codegraph",
-      "version": "3.0.4",
+      "version": "3.1.0",
       "license": "Apache-2.0",
       "dependencies": {
         "better-sqlite3": "^12.6.2",
diff --git a/package.json b/package.json
index be8238c..5694b1b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@optave/codegraph",
-  "version": "3.0.4",
+  "version": "3.1.0",
   "description": "Local code graph CLI — parse codebases with tree-sitter, build dependency graphs, query them",
   "type": "module",
   "main": "src/index.js",