feat: add Opus 4.6 context support, debug logging, and task cache (#16)

* feat: add debug logging and remove task caching

Add debug logging for workspace diagnosis to help identify when Claude
Code sends incorrect workDir. Remove task caching to simplify the
codebase - tasks are now fetched directly from providers on each call.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* feat: cache task stats and next task per workDir with TTL

Task provider results (stats + next task) now cached per-workDir with
configurable TTL, matching the existing cache pattern for git/GitHub data.
Includes old-entry eviction (>1 week) and debug logging to file.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* docs: update context window references for Opus 4.6 support

Add Opus 4.6 to context window documentation and test coverage.
Update CLAUDE.md, token comments, and changelog. Fix whitespace
alignment in test files.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: kostyay

CHANGELOG.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## feat/debug-logging-remove-task-cache
+
+Debug logging for workspace diagnosis and task caching removal (#16).
+Stdin parsing now logs workDir, sessionID, and model to stderr for
+troubleshooting. Task results are fetched directly from providers instead
+of going through the cache layer, simplifying the data path. Context
+window documentation updated to reflect Opus 4.6 support alongside
+Sonnet 4.5 and Sonnet 4 for the [1m] beta.
+
 ## Unreleased
 
 ### Added

CLAUDE.md

@@ -39,7 +39,7 @@ The binary reads JSON from stdin containing model, workspace, version, and trans
 
 - Dependency injection via interfaces (Commander, HTTPClient, TokenGetter, Clock) for testing
 - Cache invalidation keyed on file mtimes: `.git/HEAD` for branch, `.git/index` for status
-- Model-aware context limits: 1M tokens for Sonnet 4.5 [1m], 200k for others
+- Model-aware context limits: 1M tokens for Opus 4.6/Sonnet 4.5/Sonnet 4 [1m], 200k for others
 
 ### File Locations (XDG)
 

cmd/claude-status/main.go

@@ -33,7 +33,14 @@ func main() {
 		return
 	}
 
-	slog.SetDefault(slog.New(slog.NewTextHandler(os.Stderr, nil)))
+	// Log to file for debugging
+	logFile, err := os.OpenFile("/tmp/claude-status-debug.log", os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
+	if err == nil {
+		slog.SetDefault(slog.New(slog.NewTextHandler(logFile, &slog.HandlerOptions{Level: slog.LevelDebug})))
+		defer logFile.Close()
+	} else {
+		slog.SetDefault(slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: slog.LevelDebug})))
+	}
 	os.Exit(runMain())
 }
 
@@ -73,6 +80,11 @@ func run() error {
 		}
 	}
 
+	slog.Debug("received input",
+		"workDir", input.Workspace.CurrentDir,
+		"sessionID", input.SessionID,
+		"model", input.Model.ID)
+
 	// Build status data
 	builder, err := status.NewBuilder(&cfg, input.Workspace.CurrentDir, input.SessionID)
 	if err != nil {

internal/claudetasks/claudetasks_test.go

@@ -51,7 +51,7 @@ func TestClient_GetStats(t *testing.T) {
 		{ID: "2", Subject: "Task 2", Status: "in_progress"},
 		{ID: "3", Subject: "Task 3", Status: "pending", BlockedBy: []string{"1"}}, // not blocked (1 is completed)
 		{ID: "4", Subject: "Task 4", Status: "pending", BlockedBy: []string{"2"}}, // blocked (2 is in_progress)
-		{ID: "5", Subject: "Task 5", Status: "pending"},                            // ready
+		{ID: "5", Subject: "Task 5", Status: "pending"},                           // ready
 	}
 
 	for i, task := range tasks {

internal/kt/kt.go

@@ -98,6 +98,7 @@ func (c *Client) GetStats() (tasks.Stats, error) {
 		}
 	}
 
+	slog.Debug("kt stats result", "workDir", c.workDir, "total", stats.TotalIssues, "ready", stats.ReadyIssues)
 	return stats, nil
 }
 

internal/tasks/registry_test.go

@@ -33,10 +33,10 @@ type mockProvider struct {
 	available bool
 }
 
-func (m *mockProvider) Name() string                    { return m.name }
-func (m *mockProvider) Available() bool                 { return m.available }
-func (m *mockProvider) GetStats() (Stats, error)        { return Stats{}, nil }
-func (m *mockProvider) GetNextTask() (string, error)    { return "", nil }
+func (m *mockProvider) Name() string                 { return m.name }
+func (m *mockProvider) Available() bool              { return m.available }
+func (m *mockProvider) GetStats() (Stats, error)     { return Stats{}, nil }
+func (m *mockProvider) GetNextTask() (string, error) { return "", nil }
 
 func TestSelectProvider_Priority(t *testing.T) {
 	// Save and restore original registry

internal/tokens/tokens.go

@@ -19,12 +19,12 @@ type Metrics struct {
 
 // ContextConfig holds model-specific context limits.
 type ContextConfig struct {
-	MaxTokens    int64 // Maximum context window (1M for Sonnet 4.5 [1m], 200k otherwise)
+	MaxTokens    int64 // Maximum context window (1M for Opus 4.6/Sonnet 4.5/Sonnet 4 [1m], 200k otherwise)
 	UsableTokens int64 // Usable context before auto-compact (80% of max)
 }
 
 // GetContextConfig returns context limits based on model ID.
-// Only models with "[1m]" suffix have 1M context, all others have 200k.
+// Models with "[1m]" suffix (Opus 4.6, Sonnet 4.5, Sonnet 4) have 1M context, all others have 200k.
 func GetContextConfig(modelID string) ContextConfig {
 	if strings.Contains(strings.ToLower(modelID), "[1m]") {
 		return ContextConfig{

internal/tokens/tokens_test.go

@@ -31,6 +31,18 @@ func TestGetContextConfig(t *testing.T) {
 			wantMax:    1_000_000,
 			wantUsable: 800_000,
 		},
+		{
+			name:       "Opus 4.6 (200k default)",
+			modelID:    "claude-opus-4-6",
+			wantMax:    200_000,
+			wantUsable: 160_000,
+		},
+		{
+			name:       "Opus 4.6 with [1m] suffix",
+			modelID:    "claude-opus-4-6[1m]",
+			wantMax:    1_000_000,
+			wantUsable: 800_000,
+		},
 		{
 			name:       "Standard model",
 			modelID:    "claude-opus-4-5-20251101",