chore: remove fatih/color references, fix scanner error handling in mcp.go

- Remove stale fatih/color mentions from CLAUDE.md and .golangci.yml
- Add missing color.go and update.go to CLAUDE.md structure listing
- Surface scanner.Err() to stderr in extractCwdFromTranscript instead of silently discarding

Author: backstabslash

.golangci.yml

@@ -4,9 +4,6 @@ linters:
   settings:
     errcheck:
       exclude-functions:
-        - (*github.com/fatih/color.Color).Print
-        - (*github.com/fatih/color.Color).Printf
-        - (*github.com/fatih/color.Color).Println
         - fmt.Print
         - fmt.Printf
         - fmt.Println

CLAUDE.md

@@ -4,7 +4,7 @@ CLI tool that parses Claude Code JSONL logs from `~/.claude/projects/` and calcu
 
 ## Stack
 
-Go 1.26, stdlib + fatih/color, GoReleaser for cross-platform builds
+Go 1.26, stdlib only (zero external deps), GoReleaser for cross-platform builds
 
 ## Structure
 
@@ -14,9 +14,11 @@ Go 1.26, stdlib + fatih/color, GoReleaser for cross-platform builds
 ├── parser.go          # JSONL log walking, file parsing (parseFile), deduplication by requestId
 ├── pricing.go         # Per-model pricing table, cost calculation, model name resolution
 ├── format.go          # Terminal and JSON output formatting
+├── color.go           # ANSI color helpers (custom implementation, no external deps)
 ├── statusline.go      # Claude Code statusline mode (reads stdin JSON, outputs formatted cost line)
 ├── currency.go        # Currency config (~/.goccc.json), exchange rate fetching/caching, symbol table
 ├── mcp.go             # MCP server detection, per-project disable filtering, plugin walk
+├── update.go          # Version update checking against GitHub releases
 ├── *_test.go          # Table-driven tests for each module
 ├── fixture_test.go    # Integration test against realistic JSONL fixture
 ├── testdata/          # Static JSONL fixture (multi-turn convo with subagents)

mcp.go

@@ -3,6 +3,7 @@ package main
 import (
 	"bufio"
 	"encoding/json"
+	"fmt"
 	"os"
 	"path/filepath"
 	"sort"
@@ -218,7 +219,9 @@ func extractCwdFromTranscript(transcriptPath string) string {
 			return entry.Cwd
 		}
 	}
-	_ = scanner.Err()
+	if err := scanner.Err(); err != nil {
+		fmt.Fprintf(os.Stderr, "goccc: warning: reading transcript for cwd: %v\n", err)
+	}
 	return ""
 }