use debug for logging, teach agents how to enable debug

Entire-Checkpoint: 072b7f08a759

Author: Soph

CLAUDE.md

@@ -261,6 +261,7 @@ if settings.IsSummarizeEnabled() {
 ### Logging vs User Output
 
 - **Internal/debug logging**: Use `logging.Debug/Info/Warn/Error(ctx, msg, attrs...)` from `cmd/entire/cli/logging/`. Writes to `.entire/logs/`.
+- **Enabling debug/perf logs locally**: Prefer adding `"log_level": "DEBUG"` to `.entire/settings.local.json` when you need detailed hook/perf logs. This file is gitignored, so it is a low-risk local-only change. `ENTIRE_LOG_LEVEL=debug` also works and takes precedence.
 - **User-facing output**: Use `fmt.Fprint*(cmd.OutOrStdout(), ...)` or `cmd.ErrOrStderr()`.
 
 Don't use `fmt.Print*` for operational messages (checkpoint saves, hook invocations, strategy decisions) - those should use the `logging` package.

cmd/entire/cli/checkpoint/committed.go

@@ -707,7 +707,7 @@ func (s *GitStore) writeTranscript(ctx context.Context, opts WriteCommittedOptio
 	}
 	contentHashSpan.End()
 
-	logging.Info(logCtx, "write transcript timings",
+	logging.Debug(logCtx, "write transcript timings",
 		slog.String("session_id", opts.SessionID),
 		slog.String("checkpoint_id", opts.CheckpointID.String()),
 		slog.String("agent", string(opts.Agent)),

cmd/entire/cli/strategy/manual_commit_condensation.go

@@ -296,7 +296,7 @@ func (s *ManualCommitStrategy) CondenseSession(ctx context.Context, repo *git.Re
 	writeCommittedV2Span.End()
 	writeV2Duration := time.Since(writeV2Start)
 
-	logging.Info(logCtx, "condense timings",
+	logging.Debug(logCtx, "condense timings",
 		slog.String("session_id", state.SessionID),
 		slog.String("checkpoint_id", checkpointID.String()),
 		slog.Int64("extract_session_data_ms", extractDuration.Milliseconds()),

cmd/entire/cli/strategy/manual_commit_hooks.go

@@ -2665,7 +2665,7 @@ func (s *ManualCommitStrategy) carryForwardToNewShadowBranch(
 		slog.String("session_id", state.SessionID),
 		slog.Int("remaining_files", len(remainingFiles)),
 	)
-	logging.Info(logCtx, "carry-forward timings",
+	logging.Debug(logCtx, "carry-forward timings",
 		slog.String("session_id", state.SessionID),
 		slog.Int64("write_carry_forward_shadow_ms", duration.Milliseconds()),
 		slog.Int("remaining_files", len(remainingFiles)),