v0.42.0: session_search tool — browse, search, and recall past sessions

New native tool: session_search with 4 actions:
- list — recent N sessions with metadata
- search — keyword search across task, buffer, and full transcripts
- get — load full session by ID (metadata + buffer + message count)
- find — match sessions by task/title

Keyword search uses two-phase strategy:
  1. Task + buffer match (uses session index, no file I/O)
  2. Deep search — loads sessions and searches full messages when needed

Zero new dependencies (stdlib + existing session package)
21 new tests covering all actions, edge cases, empty store, limits
Narrator emoji already mapped (🧠 via existing render entry)

Author: molty3000

cmd/odek/main.go

@@ -1002,7 +1002,7 @@ func run(args []string) error {
 
 	// Sandbox setup
 	var sandboxCleanup func() error
-	tools := builtinTools(resolved.Dangerous, sm, nil, resolved.MaxConcurrency, resolved.Transcription)
+	tools := builtinTools(resolved.Dangerous, sm, nil, resolved.MaxConcurrency, resolved.Transcription, nil)
 
 	// MCP server tools
 	var mcpCleanup func()
@@ -1382,7 +1382,7 @@ func injectFilesToSandbox(containerName string, files []string, cwd string) (int
 	return injected, nil
 }
 
-func builtinTools(dc danger.DangerousConfig, sm *skills.SkillManager, approver danger.Approver, maxConcurrency int, tc config.TranscriptionConfig) []odek.Tool {
+func builtinTools(dc danger.DangerousConfig, sm *skills.SkillManager, approver danger.Approver, maxConcurrency int, tc config.TranscriptionConfig, store *session.Store) []odek.Tool {
 	tools := []odek.Tool{
 		&shellTool{
 			dangerousConfig: dc,
@@ -1416,6 +1416,7 @@ func builtinTools(dc danger.DangerousConfig, sm *skills.SkillManager, approver d
 		&trTool{dangerousConfig: dc},
 		&wordCountTool{dangerousConfig: dc},
 		newTranscribeTool(dc, tc),
+		newSessionSearchTool(store),
 		newBrowserTool(dc),
 	}
 
@@ -1960,7 +1961,7 @@ func continueCmd(args []string) error {
 			"./.odek/skills",
 		)
 	}
-	tools := builtinTools(resolved.Dangerous, sm, nil, resolved.MaxConcurrency, resolved.Transcription)
+	tools := builtinTools(resolved.Dangerous, sm, nil, resolved.MaxConcurrency, resolved.Transcription, store)
 	var sandboxCleanup func() error
 
 	// MCP server tools

cmd/odek/main_test.go

@@ -201,7 +201,7 @@ func TestRun_NoAPIKey(t *testing.T) {
 }
 
 func TestBuiltinTools(t *testing.T) {
-	tools := builtinTools(danger.DangerousConfig{}, nil, nil, 3, config.TranscriptionConfig{})
+	tools := builtinTools(danger.DangerousConfig{}, nil, nil, 3, config.TranscriptionConfig{}, nil)
 	if len(tools) == 0 {
 		t.Fatal("builtinTools() returned empty slice")
 	}

cmd/odek/mcp.go

@@ -73,7 +73,7 @@ Flags:
 	}
 
 	// Build tools
-	toolSet := builtinTools(resolved.Dangerous, sm, nil, resolved.MaxConcurrency, config.TranscriptionConfig{})
+	toolSet := builtinTools(resolved.Dangerous, sm, nil, resolved.MaxConcurrency, config.TranscriptionConfig{}, nil)
 
 	// MCP server tools — connect and discover before sandbox
 	var mcpCleanup func()

cmd/odek/repl.go

@@ -79,7 +79,7 @@ func replCmd(args []string) error {
 			"./.odek/skills",
 		)
 	}
-	tools := builtinTools(resolved.Dangerous, sm, nil, resolved.MaxConcurrency, config.TranscriptionConfig{})
+	tools := builtinTools(resolved.Dangerous, sm, nil, resolved.MaxConcurrency, config.TranscriptionConfig{}, nil)
 	var sandboxCleanup func() error
 
 	// MCP server tools

cmd/odek/serve.go

@@ -187,7 +187,7 @@ func newServeAgent(resolved config.ResolvedConfig, system string, sendFn func(v
 	approver := newWSApprover(sendFn)
 	resolved.Dangerous.Approver = approver
 
-	tools := builtinTools(resolved.Dangerous, sm, approver, resolved.MaxConcurrency, config.TranscriptionConfig{})
+	tools := builtinTools(resolved.Dangerous, sm, approver, resolved.MaxConcurrency, config.TranscriptionConfig{}, nil)
 
 	// Find the delegateTasksTool to wire up sub-agent log streaming
 	var subagentTool *delegateTasksTool