[codex] Add optimization intelligence reports (#129)

* Add optimization intelligence reports

* Improve optimization TUI readability

Author: ya-nsh

README.md

@@ -142,6 +142,11 @@ tokenleak focus --provider codex --days 30
 tokenleak nutrition
 tokenleak nutrition --days 30 --format json
 
+# Optimization intelligence
+tokenleak simulate-routing --days 30
+tokenleak waste --severity high
+tokenleak behavior-diff --provider claude-code,codex --days 30 --format json
+
 # Authenticate Cursor and sync its local cache
 tokenleak cursor login --name work
 
@@ -151,7 +156,7 @@ tokenleak --list-providers
 
 ### Analysis commands
 
-Tokenleak ships three dedicated investigation commands in addition to the main dashboard flow:
+Tokenleak ships dedicated investigation and optimization commands in addition to the main dashboard flow:
 
 ```bash
 # Explain what drove a specific day
@@ -181,12 +186,24 @@ tokenleak nutrition --days 30
 
 # Emit the AI ROI report as JSON
 tokenleak nutrition --format json --output ai-roi.json
+
+# Estimate savings from model routing
+tokenleak simulate-routing --days 30
+
+# Detect agent waste signals with evidence and recipes
+tokenleak waste --days 30
+
+# Compare two agent/provider/model cohorts
+tokenleak behavior-diff --provider claude-code,codex --days 30
 ```
 
 - `tokenleak explain <date>` builds a narrative day report with top providers, sessions, projects, models, and anomaly flags.
 - `tokenleak focus` ranks sessions by a deep-work score derived from duration, token density, and project streak.
 - `tokenleak replay [date]` shows a chronological timeline of all sessions for a day, clustering events into flow blocks with a pulse chart and flow/think ratio. Defaults to today. Pass `--interactive` (or `-i`) to open a browser scrub UI on `http://localhost:3567` — drag the timeline, press space to play the day at 60–600× speed, watch the cumulative cost odometer tick up. Combine with `--open` to launch the browser automatically.
 - `tokenleak nutrition` powers the TUI **AI ROI** view. It resolves local Git repo roots from provider project paths, runs read-only `git log --numstat`, and reports tokens/cost per commit and changed line. `No Git signal` means Tokenleak saw AI usage for a repo path but found no commits in the selected date window; switch to a wider window or ensure the project path exists locally as a Git worktree.
+- `tokenleak simulate-routing` re-prices historical events under conservative downgrade rules so pro users can estimate savings before changing model habits or team guidance.
+- `tokenleak waste` detects deterministic waste signals such as context drag, repeated prompt clusters, model churn, cache misses, and premium models used for small tasks.
+- `tokenleak behavior-diff` compares cohorts such as provider-vs-provider or model-vs-model and emits deterministic takeaways for engineering teams.
 
 ### Cursor commands
 

packages/cli/src/cli.test.ts

@@ -797,7 +797,9 @@ describe('CLI invocation', () => {
     expect(stdout).toContain('--more');
     expect(stdout).toContain('tokenleak explain <date>');
     expect(stdout).toContain('focus');
-    expect(stdout).not.toContain('tokenleak waste');
+    expect(stdout).toContain('tokenleak simulate-routing');
+    expect(stdout).toContain('tokenleak waste');
+    expect(stdout).toContain('tokenleak behavior-diff');
     expect(stdout).toContain('interactive launcher');
     expect(stdout).toContain('Examples:');
   });
@@ -874,16 +876,74 @@ describe('CLI invocation', () => {
     expect(stderr).toContain('--days must be a positive number');
   });
 
-  test('waste is not exposed as a standalone command', async () => {
+  test('waste --help exits with code 0 and prints waste usage', async () => {
     const proc = Bun.spawn(['bun', cliPath, 'waste', '--help'], {
       stdout: 'pipe',
       stderr: 'pipe',
     });
     const exitCode = await proc.exited;
-    const stderr = await new Response(proc.stderr).text();
+    const stdout = await new Response(proc.stdout).text();
 
-    expect(exitCode).toBe(1);
-    expect(stderr).toContain('Advisor view for Waste Patterns');
+    expect(exitCode).toBe(0);
+    expect(stdout).toContain('tokenleak waste');
+    expect(stdout).toContain('agent waste signals');
+  });
+
+  test('waste emits a JSON agent waste report', async () => {
+    const { env, cleanup } = createProviderFixtureEnv();
+
+    try {
+      const waste = Bun.spawn(['bun', cliPath, 'waste', '--format', 'json', '--provider', 'pi'], {
+        stdout: 'pipe',
+        stderr: 'pipe',
+        env,
+      });
+      const wasteExit = await waste.exited;
+      const wasteStdout = await new Response(waste.stdout).text();
+      expect(wasteExit).toBe(0);
+      expect(JSON.parse(wasteStdout).summary).toBeDefined();
+    } finally {
+      cleanup();
+    }
+  });
+
+  test('simulate-routing emits a JSON routing report', async () => {
+    const { env, cleanup } = createProviderFixtureEnv();
+
+    try {
+      const simulate = Bun.spawn(['bun', cliPath, 'simulate-routing', '--format', 'json', '--provider', 'pi'], {
+        stdout: 'pipe',
+        stderr: 'pipe',
+        env,
+      });
+      const simulateExit = await simulate.exited;
+      const simulateStdout = await new Response(simulate.stdout).text();
+      expect(simulateExit).toBe(0);
+      expect(JSON.parse(simulateStdout).strategy).toBe('conservative');
+    } finally {
+      cleanup();
+    }
+  });
+
+  test('behavior-diff emits a JSON behavior diff report', async () => {
+    const { env, cleanup } = createProviderFixtureEnv();
+
+    try {
+      const diff = Bun.spawn(
+        ['bun', cliPath, 'behavior-diff', '--format', 'json', '--provider', 'pi,claude-code'],
+        {
+          stdout: 'pipe',
+          stderr: 'pipe',
+          env,
+        },
+      );
+      const diffExit = await diff.exited;
+      const diffStdout = await new Response(diff.stdout).text();
+      expect(diffExit).toBe(0);
+      expect(JSON.parse(diffStdout).takeaways).toBeArray();
+    } finally {
+      cleanup();
+    }
   });
 
   test('--version prints version', async () => {