type: user

role: user

content:
You are implementing Task 2 of the birdseye known-modules cache implementation plan — hardening tests.

## Working Environment

- **Worktree path:** `/Users/steve.briggs/projects/operations/.claude/worktrees/birdseye`
- **Git branch:** `worktree-birdseye`
- **HEAD:** `32e305b` (Task 1 just landed: known package core with Path/Load/Add)
- Use absolute paths or `cd` into the worktree.
- **NEVER push.** **NEVER `git add .` / `git add -A`.**

## Context

Task 1 created `apps/birdseye/internal/known/known.go` with `Path()`, `Load()`, `Add()`, plus private `mergeAndSort()` and `validAddress()`. Existing tests cover happy paths (file creation, round-trip, missing file, path layout). The implementation already handles dedup, sort, atomic writes, bad-address rejection, and malformed-line skipping — your job is to ADD the tests that prove it.

Pure test-only commit. Do NOT modify `known.go`. If any test fails it's a real bug — STOP and report, don't change production code.

## Task Description (Verbatim)

### Task 2: `internal/known` — hardening tests

**Files:**
- Modify: `apps/birdseye/internal/known/known_test.go`

- [ ] **Step 1: Append failing tests** to `apps/birdseye/internal/known/known_test.go`:

```go
import (
	"strings"
	// existing imports preserved
)

func TestAddDeduplicates(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	for i := 0; i < 3; i++ {
		if err := Add(path, "iac/comply/aws"); err != nil {
			t.Fatalf("Add iteration %d: %v", i, err)
		}
	}
	body, err := os.ReadFile(path)
	if err != nil {
		t.Fatal(err)
	}
	lines := strings.Split(strings.TrimRight(string(body), "\n"), "\n")
	if len(lines) != 1 {
		t.Errorf("expected 1 unique line, got %d: %v", len(lines), lines)
	}
}

func TestAddSortsAlphabetically(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	for _, addr := range []string{"z/y/x", "a/b/c", "m/n/o"} {
		if err := Add(path, addr); err != nil {
			t.Fatalf("Add %s: %v", addr, err)
		}
	}
	got, err := Load(path)
	if err != nil {
		t.Fatal(err)
	}
	want := []string{"a/b/c", "m/n/o", "z/y/x"}
	if len(got) != len(want) {
		t.Fatalf("got %d lines, want %d", len(got), len(want))
	}
	for i := range got {
		if got[i] != want[i] {
			t.Errorf("got[%d] = %s, want %s", i, got[i], want[i])
		}
	}
}

func TestAddAtomicNoLingeringTemp(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	if err := Add(path, "iac/comply/aws"); err != nil {
		t.Fatalf("Add: %v", err)
	}
	entries, err := os.ReadDir(dir)
	if err != nil {
		t.Fatal(err)
	}
	for _, e := range entries {
		if strings.HasPrefix(e.Name(), ".known-modules-") && strings.HasSuffix(e.Name(), ".tmp") {
			t.Errorf("found lingering temp file: %s", e.Name())
		}
	}
}

func TestAddRejectsBadAddress(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	cases := []string{
		"not-three-parts",
		"two/parts",
		"four/parts/here/extra",
		"has spaces/in/it",
		"",
	}
	for _, addr := range cases {
		t.Run(addr, func(t *testing.T) {
			if err := Add(path, addr); err == nil {
				t.Errorf("expected error for %q, got nil", addr)
			}
		})
	}
	// File must not have been created.
	if _, err := os.Stat(path); !os.IsNotExist(err) {
		t.Errorf("expected file to NOT exist, got err=%v", err)
	}
}

func TestLoadSkipsMalformedLines(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	content := "iac/comply/aws\nnot-valid\ntwo/parts\nplatform/networking/aws\n"
	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
		t.Fatal(err)
	}
	got, err := Load(path)
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	want := []string{"iac/comply/aws", "platform/networking/aws"}
	if len(got) != len(want) {
		t.Fatalf("got %v, want %v", got, want)
	}
	for i := range got {
		if got[i] != want[i] {
			t.Errorf("got[%d] = %s, want %s", i, got[i], want[i])
		}
	}
}

func TestLoadSkipsBlankLines(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	content := "\niac/comply/aws\n\n\nplatform/networking/aws\n"
	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
		t.Fatal(err)
	}
	got, err := Load(path)
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if len(got) != 2 {
		t.Errorf("got %d lines, want 2: %v", len(got), got)
	}
}
```

NOTE: Merge the `strings` import into the existing import block at the top of the file. `os`, `path/filepath`, `testing` are already imported from Task 1.

- [ ] **Step 2: Run, expect PASS**

Run: `cd /Users/steve.briggs/projects/operations/.claude/worktrees/birdseye/apps/birdseye && go test -race ./internal/known/... -v`
Expected: All 10 tests PASS (4 from Task 1 + 6 new).

- [ ] **Step 3: Commit**

```bash
cd /Users/steve.briggs/projects/operations/.claude/worktrees/birdseye && git add apps/birdseye/internal/known/known_test.go && git commit -m "test(birdseye): harden known-modules cache (dedup, sort, atomic, validation)"
```

## Notes

- These tests should ALL PASS without changing `known.go`. The Task 1 implementation already covers these cases. If any fail, that's a real bug — STOP and report, do NOT modify `known.go`.
- `TestAddRejectsBadAddress` includes the empty string case — `validAddress("")` should fail because `strings.Split("", "/")` returns `[""]` (length 1), failing the `len(parts) == 3` check.

## Self-Review Checklist

- [ ] 10 total tests pass (`-race`)
- [ ] No production code changed (only `known_test.go`)
- [ ] `go vet ./...` clean
- [ ] Commit message exactly: `test(birdseye): harden known-modules cache (dedup, sort, atomic, validation)`
- [ ] Only `apps/birdseye/internal/known/known_test.go` staged

## Report Format

- **Status:** DONE | DONE_WITH_CONCERNS | BLOCKED | NEEDS_CONTEXT
- Test count + race-clean
- Confirmation that `known.go` was NOT modified
- Commit SHA
- Anything unexpected

userType: external

entrypoint: cli

gitBranch: worktree-birdseye


content:
- migrate-flux-app: Use when migrating a Flux CD application from the infrastructure/kubernetes/application-deployments repo to the application-deployment repo. Covers copying app folders, updating kustomizations, committing, pushing, and creating merge requests.
- app-infra-generate: Generate an application-infrastructure Terraform module from a YAML spec produced by app-infra-spec. Reads pattern files and a versions manifest to produce main.tf, variables.tf, outputs.tf, overlay guidance, and a triage list.
- app-infra-spec: Structured questionnaire to gather requirements for an application-infrastructure Terraform module. Produces a YAML spec for the app-infra-generate skill.
- obsidian-load: Load context from Obsidian notes in the `Claude/` directory into the current conversation.
- obsidian-save: Save current conversation context to an Obsidian note under the `Claude/` directory.
- mind:search: Search memories for specific content or patterns
- mind:stats: Show memory statistics and storage information
- mind:recent: Show recent memories and activity timeline
- mind:ask: Ask questions about memories and get context-aware answers
- superpowers:using-git-worktrees: Use when starting feature work that needs isolation from current workspace or before executing implementation plans - ensures an isolated workspace exists via native tools or git worktree fallback
- superpowers:receiving-code-review: Use when receiving code review feedback, before implementing suggestions, especially if feedback seems unclear or technically questionable - requires technical rigor and verification, not performative agreement or blind implementation
- superpowers:finishing-a-development-branch: Use when implementation is complete, all tests pass, and you need to decide how to integrate the work - guides completion of development work by presenting structured options for merge, PR, or cleanup
- superpowers:dispatching-parallel-agents: Use when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies
- superpowers:writing-plans: Use when you have a spec or requirements for a multi-step task, before touching code
- superpowers:using-superpowers: Use when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions
- superpowers:writing-skills: Use when creating new skills, editing existing skills, or verifying skills work before deployment
- superpowers:requesting-code-review: Use when completing tasks, implementing major features, or before merging to verify work meets requirements
- superpowers:executing-plans: Use when you have a written implementation plan to execute in a separate session with review checkpoints
- superpowers:verification-before-completion: Use when about to claim work is complete, fixed, or passing, before committing or creating PRs - requires running verification commands and confirming output before making any success claims; evidence before assertions always
- superpowers:brainstorming: You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.
- superpowers:systematic-debugging: Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes
- superpowers:test-driven-development: Use when implementing any feature or bugfix, before writing implementation code
- superpowers:subagent-driven-development: Use when executing implementation plans with independent tasks in the current session
- mind:memory: Claude Mind - Search and manage Claude's persistent memory stored in a single portable .mv2 file
- mind:mind: Claude Mind - Search and manage Claude's persistent memory stored in a single portable .mv2 file
- update-config: Use this skill to configure the Claude Code harness via settings.json. Automated behaviors ("from now on when X", "each time X", "whenever X", "before/after X") require hooks configured in settings.json - the harness executes these, not Claude, so memory/preferences cannot fulfill them. Also use for: permissions ("allow X", "add permission", "move permission to"), env vars ("set X=Y"), hook troubleshooting, or any changes to settings.json/settings.local.json files. Examples: "allow npm commands", "add bq permission to global settings", "move permission to user settings", "set DEBUG=true", "when claude stops show X". For simple settings like theme/model, suggest the /config command.
- keybindings-help: Use when the user wants to customize keyboard shortcuts, rebind keys, add chord bindings, or modify ~/.claude/keybindings.json. Examples: "rebind ctrl+s", "add a chord shortcut", "change the submit key", "customize keybindings".
- simplify: Review changed code for reuse, quality, and efficiency, then fix any issues found.
- fewer-permission-prompts: Scan your transcripts for common read-only Bash and MCP tool calls, then add a prioritized allowlist to project .claude/settings.json to reduce permission prompts.
- loop: Run a prompt or slash command on a recurring interval (e.g. /loop 5m /foo). Omit the interval to let the model self-pace. - When the user wants to set up a recurring task, poll for status, or run something repeatedly on an interval (e.g. "check the deploy every 5 minutes", "keep running /babysit-prs"). Do NOT invoke for one-off tasks.
- schedule: Create, update, list, or run scheduled remote agents (routines) that execute on a cron schedule. - When the user wants to schedule a recurring remote agent, set up automated tasks, create a cron job for Claude Code, or manage their scheduled agents/routines. Also use when the user wants a one-time scheduled run ("run this once at 3pm", "remind me to check X tomorrow").
- claude-api: Build, debug, and optimize Claude API / Anthropic SDK apps. Apps built with this skill should include prompt caching. Also handles migrating existing Claude API code between Claude model versions (4.5 → 4.6, 4.6 → 4.7, retired-model replacements).
TRIGGER when: code imports `anthropic`/`@anthropic-ai/sdk`; user asks for the Claude API, Anthropic SDK, or Managed Agents; user adds/modifies/tunes a Claude feature (caching, thinking, compaction, tool use, batch, files, citations, memory) or model (Opus/Sonnet/Haiku) in a file; questions about prompt caching / cache hit rate in an Anthropic SDK project.
SKIP: file imports `openai`/other-provider SDK, filename like `*-openai.py`/`*-generic.py`, provider-neutral code, general programming/ML.
- init: Initialize a new CLAUDE.md file with codebase documentation
- review: Review a pull request
- security-review: Complete a security review of the pending changes on the current branch

type: attachment


type: message

role: assistant

type: text

text: I'll implement Task 2 by reading the existing test file first, then adding the new tests.

service_tier: standard

attributionAgent: general-purpose

attributionPlugin: superpowers

type: assistant


Read

type: direct


speed: standard


content:
1	package known
2
3	import (
4		"os"
5		"path/filepath"
6		"testing"
7	)
8
9	func TestLoadMissingFileReturnsEmpty(t *testing.T) {
10		dir := t.TempDir()
11		got, err := Load(filepath.Join(dir, "missing"))
12		if err != nil {
13			t.Fatalf("Load: %v", err)
14		}
15		if len(got) != 0 {
16			t.Errorf("expected empty slice, got %v", got)
17		}
18	}
19
20	func TestAddCreatesDirectoryAndFile(t *testing.T) {
21		dir := t.TempDir()
22		path := filepath.Join(dir, "subdir", "known-modules")
23		if err := Add(path, "iac/comply/aws"); err != nil {
24			t.Fatalf("Add: %v", err)
25		}
26		body, err := os.ReadFile(path)
27		if err != nil {
28			t.Fatalf("ReadFile: %v", err)
29		}
30		if string(body) != "iac/comply/aws\n" {
31			t.Errorf("body = %q", body)
32		}
33	}
34
35	func TestAddThenLoadRoundTrip(t *testing.T) {
36		dir := t.TempDir()
37		path := filepath.Join(dir, "known-modules")
38		if err := Add(path, "iac/comply/aws"); err != nil {
39			t.Fatalf("Add: %v", err)
40		}
41		got, err := Load(path)
42		if err != nil {
43			t.Fatalf("Load: %v", err)
44		}
45		if len(got) != 1 || got[0] != "iac/comply/aws" {
46			t.Errorf("Load = %v, want [iac/comply/aws]", got)
47		}
48	}
49
50	func TestPathHonorsUserConfigDir(t *testing.T) {
51		got, err := Path()
52		if err != nil {
53			t.Fatalf("Path: %v", err)
54		}
55		if !filepath.IsAbs(got) {
56			t.Errorf("expected absolute path, got %q", got)
57		}
58		base := filepath.Base(got)
59		if base != "known-modules" {
60			t.Errorf("expected basename %q, got %q", "known-modules", base)
61		}
62		parent := filepath.Base(filepath.Dir(got))
63		if parent != "birdseye" {
64			t.Errorf("expected parent dir %q, got %q", "birdseye", parent)
65		}
66	}
67


content:
1	// Package known persists a sorted, deduplicated list of Crow module
2	// addresses the user has successfully diff'd or browsed, so future
3	// invocations can offer shell-completion and TUI suggestions.
4	//
5	// The on-disk format is plain text, one ns/name/provider per line,
6	// alphabetically sorted, with a trailing newline. Empty or missing
7	// file means "no suggestions yet" — not an error.
8	//
9	// Concurrent writers: last writer wins. Two birdseye processes running
10	// simultaneously may each see the file before the other's Rename
11	// lands; whichever Rename completes last sets the final contents.
12	// Acceptable for a low-frequency, append-only-ish list.
13	package known
14
15	import (
16		"bufio"
17		"fmt"
18		"os"
19		"path/filepath"
20		"sort"
21		"strings"
22
23		"github.com/immuta/operations/services/crow/pkg/api"
24	)
25
26	// Path returns the default known-modules file path, honoring
27	// os.UserConfigDir() (XDG_CONFIG_HOME on Linux, Application Support on
28	// macOS). The directory is NOT created here — Add creates it lazily on
29	// first write.
30	func Path() (string, error) {
31		cfg, err := os.UserConfigDir()
32		if err != nil {
33			return "", fmt.Errorf("resolve user config dir: %w", err)
34		}
35		return filepath.Join(cfg, "birdseye", "known-modules"), nil
36	}
37
38	// Load reads the file at path. Returns an empty slice if the file
39	// does not exist (first run is normal). Lines failing the
40	// ns/name/provider validation are silently skipped. The result is
41	// sorted ascending.
42	func Load(path string) ([]string, error) {
43		f, err := os.Open(path)
44		if err != nil {
45			if os.IsNotExist(err) {
46				return nil, nil
47			}
48			return nil, fmt.Errorf("open known-modules: %w", err)
49		}
50		defer f.Close()
51
52		var out []string
53		scanner := bufio.NewScanner(f)
54		for scanner.Scan() {
55			line := strings.TrimSpace(scanner.Text())
56			if line == "" {
57				continue
58			}
59			if !validAddress(line) {
60				continue
61			}
62			out = append(out, line)
63		}
64		if err := scanner.Err(); err != nil {
65			return nil, fmt.Errorf("scan known-modules: %w", err)
66		}
67		sort.Strings(out)
68		return out, nil
69	}
70
71	// Add inserts address into the file at path. Existing entries are
72	// preserved; duplicates deduplicated; the final list is sorted.
73	// Writes are atomic via temp file + rename in the same directory.
74	// The directory is created with 0o755 if missing. If address is not a
75	// well-formed ns/name/provider triple, Add returns an error without
76	// touching the file.
77	func Add(path, address string) error {
78		if !validAddress(address) {
79			return fmt.Errorf("invalid module address %q", address)
80		}
81		if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
82			return fmt.Errorf("mkdir known-modules dir: %w", err)
83		}
84
85		existing, err := Load(path)
86		if err != nil {
87			return err
88		}
89		merged := mergeAndSort(existing, address)
90
91		tmp, err := os.CreateTemp(filepath.Dir(path), ".known-modules-*.tmp")
92		if err != nil {
93			return fmt.Errorf("create temp: %w", err)
94		}
95		tmpName := tmp.Name()
96		w := bufio.NewWriter(tmp)
97		for _, addr := range merged {
98			if _, err := w.WriteString(addr); err != nil {
99				_ = tmp.Close()
100				_ = os.Remove(tmpName)
101				return fmt.Errorf("write temp: %w", err)
102			}
103			if err := w.WriteByte('\n'); err != nil {
104				_ = tmp.Close()
105				_ = os.Remove(tmpName)
106				return fmt.Errorf("write temp: %w", err)
107			}
108		}
109		if err := w.Flush(); err != nil {
110			_ = tmp.Close()
111			_ = os.Remove(tmpName)
112			return fmt.Errorf("flush temp: %w", err)
113		}
114		if err := tmp.Close(); err != nil {
115			_ = os.Remove(tmpName)
116			return fmt.Errorf("close temp: %w", err)
117		}
118		if err := os.Rename(tmpName, path); err != nil {
119			_ = os.Remove(tmpName)
120			return fmt.Errorf("rename temp: %w", err)
121		}
122		return nil
123	}
124
125	// mergeAndSort returns a deduplicated, sorted slice combining existing
126	// with the new address.
127	func mergeAndSort(existing []string, address string) []string {
128		seen := make(map[string]struct{}, len(existing)+1)
129		out := make([]string, 0, len(existing)+1)
130		for _, a := range existing {
131			if _, dup := seen[a]; dup {
132				continue
133			}
134			seen[a] = struct{}{}
135			out = append(out, a)
136		}
137		if _, dup := seen[address]; !dup {
138			out = append(out, address)
139		}
140		sort.Strings(out)
141		return out
142	}
143
144	// validAddress checks that s is exactly three slash-separated segments
145	// each passing api.ValidateSegments.
146	func validAddress(s string) bool {
147		parts := strings.Split(s, "/")
148		if len(parts) != 3 {
149			return false
150		}
151		return api.ValidateSegments(parts) == nil
152	}
153


text: Good, I have both files. Now I'll add the new tests by merging the `strings` import and appending the 6 new test functions.


Edit

old_string:
package known

import (
	"os"
	"path/filepath"
	"testing"
)

new_string:
package known

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
)


content: The file /Users/steve.briggs/projects/operations/.claude/worktrees/birdseye/apps/birdseye/internal/known/known_test.go has been updated successfully. (file state is current in your context — no need to Read it back)


old_string:
func TestPathHonorsUserConfigDir(t *testing.T) {
	got, err := Path()
	if err != nil {
		t.Fatalf("Path: %v", err)
	}
	if !filepath.IsAbs(got) {
		t.Errorf("expected absolute path, got %q", got)
	}
	base := filepath.Base(got)
	if base != "known-modules" {
		t.Errorf("expected basename %q, got %q", "known-modules", base)
	}
	parent := filepath.Base(filepath.Dir(got))
	if parent != "birdseye" {
		t.Errorf("expected parent dir %q, got %q", "birdseye", parent)
	}
}

new_string:
func TestPathHonorsUserConfigDir(t *testing.T) {
	got, err := Path()
	if err != nil {
		t.Fatalf("Path: %v", err)
	}
	if !filepath.IsAbs(got) {
		t.Errorf("expected absolute path, got %q", got)
	}
	base := filepath.Base(got)
	if base != "known-modules" {
		t.Errorf("expected basename %q, got %q", "known-modules", base)
	}
	parent := filepath.Base(filepath.Dir(got))
	if parent != "birdseye" {
		t.Errorf("expected parent dir %q, got %q", "birdseye", parent)
	}
}

func TestAddDeduplicates(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	for i := 0; i < 3; i++ {
		if err := Add(path, "iac/comply/aws"); err != nil {
			t.Fatalf("Add iteration %d: %v", i, err)
		}
	}
	body, err := os.ReadFile(path)
	if err != nil {
		t.Fatal(err)
	}
	lines := strings.Split(strings.TrimRight(string(body), "\n"), "\n")
	if len(lines) != 1 {
		t.Errorf("expected 1 unique line, got %d: %v", len(lines), lines)
	}
}

func TestAddSortsAlphabetically(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	for _, addr := range []string{"z/y/x", "a/b/c", "m/n/o"} {
		if err := Add(path, addr); err != nil {
			t.Fatalf("Add %s: %v", addr, err)
		}
	}
	got, err := Load(path)
	if err != nil {
		t.Fatal(err)
	}
	want := []string{"a/b/c", "m/n/o", "z/y/x"}
	if len(got) != len(want) {
		t.Fatalf("got %d lines, want %d", len(got), len(want))
	}
	for i := range got {
		if got[i] != want[i] {
			t.Errorf("got[%d] = %s, want %s", i, got[i], want[i])
		}
	}
}

func TestAddAtomicNoLingeringTemp(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	if err := Add(path, "iac/comply/aws"); err != nil {
		t.Fatalf("Add: %v", err)
	}
	entries, err := os.ReadDir(dir)
	if err != nil {
		t.Fatal(err)
	}
	for _, e := range entries {
		if strings.HasPrefix(e.Name(), ".known-modules-") && strings.HasSuffix(e.Name(), ".tmp") {
			t.Errorf("found lingering temp file: %s", e.Name())
		}
	}
}

func TestAddRejectsBadAddress(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	cases := []string{
		"not-three-parts",
		"two/parts",
		"four/parts/here/extra",
		"has spaces/in/it",
		"",
	}
	for _, addr := range cases {
		t.Run(addr, func(t *testing.T) {
			if err := Add(path, addr); err == nil {
				t.Errorf("expected error for %q, got nil", addr)
			}
		})
	}
	// File must not have been created.
	if _, err := os.Stat(path); !os.IsNotExist(err) {
		t.Errorf("expected file to NOT exist, got err=%v", err)
	}
}

func TestLoadSkipsMalformedLines(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	content := "iac/comply/aws\nnot-valid\ntwo/parts\nplatform/networking/aws\n"
	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
		t.Fatal(err)
	}
	got, err := Load(path)
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	want := []string{"iac/comply/aws", "platform/networking/aws"}
	if len(got) != len(want) {
		t.Fatalf("got %v, want %v", got, want)
	}
	for i := range got {
		if got[i] != want[i] {
			t.Errorf("got[%d] = %s, want %s", i, got[i], want[i])
		}
	}
}

func TestLoadSkipsBlankLines(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "known-modules")
	content := "\niac/comply/aws\n\n\nplatform/networking/aws\n"
	if err := os.WriteFile(path, []byte(content), 0o600); err != nil {
		t.Fatal(err)
	}
	got, err := Load(path)
	if err != nil {
		t.Fatalf("Load: %v", err)
	}
	if len(got) != 2 {
		t.Errorf("got %d lines, want 2: %v", len(got), got)
	}
}


text: Now run the tests with the race detector:


Bash

command: cd /Users/steve.briggs/projects/operations/.claude/worktrees/birdseye/apps/birdseye && go test -race ./internal/known/... -v 2>&1

description: Run known package tests with race detector


content:
=== RUN   TestLoadMissingFileReturnsEmpty
--- PASS: TestLoadMissingFileReturnsEmpty (0.00s)
=== RUN   TestAddCreatesDirectoryAndFile
--- PASS: TestAddCreatesDirectoryAndFile (0.00s)
=== RUN   TestAddThenLoadRoundTrip
--- PASS: TestAddThenLoadRoundTrip (0.00s)
=== RUN   TestPathHonorsUserConfigDir
--- PASS: TestPathHonorsUserConfigDir (0.00s)
=== RUN   TestAddDeduplicates
--- PASS: TestAddDeduplicates (0.00s)
=== RUN   TestAddSortsAlphabetically
--- PASS: TestAddSortsAlphabetically (0.00s)
=== RUN   TestAddAtomicNoLingeringTemp
--- PASS: TestAddAtomicNoLingeringTemp (0.00s)
=== RUN   TestAddRejectsBadAddress
=== RUN   TestAddRejectsBadAddress/not-three-parts
=== RUN   TestAddRejectsBadAddress/two/parts
=== RUN   TestAddRejectsBadAddress/four/parts/here/extra
=== RUN   TestAddRejectsBadAddress/has_spaces/in/it
=== RUN   TestAddRejectsBadAddress/#00
--- PASS: TestAddRejectsBadAddress (0.00s)
    --- PASS: TestAddRejectsBadAddress/not-three-parts (0.00s)
    --- PASS: TestAddRejectsBadAddress/two/parts (0.00s)
    --- PASS: TestAddRejectsBadAddress/four/parts/here/extra (0.00s)
    --- PASS: TestAddRejectsBadAddress/has_spaces/in/it (0.00s)
    --- PASS: TestAddRejectsBadAddress/#00 (0.00s)
=== RUN   TestLoadSkipsMalformedLines
--- PASS: TestLoadSkipsMalformedLines (0.00s)
=== RUN   TestLoadSkipsBlankLines
--- PASS: TestLoadSkipsBlankLines (0.00s)
PASS
ok  	github.com/immuta/operations/apps/birdseye/internal/known	2.348s


text: All 10 tests pass (4 original + 6 new), race-clean. Now run `go vet` and commit:


command: cd /Users/steve.briggs/projects/operations/.claude/worktrees/birdseye/apps/birdseye && go vet ./... 2>&1

description: Run go vet on the birdseye module


content: (Bash completed with no output)


text: Clean. Now commit:


command:
git add apps/birdseye/internal/known/known_test.go && git commit -m "$(cat <<'EOF'
test(birdseye): harden known-modules cache (dedup, sort, atomic, validation)
EOF
)"

description: Commit hardened known-modules tests


content:
[worktree-birdseye 171c32a] test(birdseye): harden known-modules cache (dedup, sort, atomic, validation)
 1 file changed, 120 insertions(+)


text:
**Status:** DONE

- **Tests:** 10/10 pass, race-clean (`-race` flag). 4 from Task 1, 6 new hardening tests covering dedup, alphabetical sort, atomic writes (no lingering temp files), bad-address rejection (5 sub-cases), malformed-line skipping, and blank-line skipping.
- **`go vet`:** Clean, no issues.
- **Production code:** `known.go` was NOT modified — only `apps/birdseye/internal/known/known_test.go` was changed (120 lines added: `strings` import + 6 new test functions).
- **Commit SHA:** `171c32a` with message exactly `test(birdseye): harden known-modules cache (dedup, sort, atomic, validation)`.
- **Nothing unexpected:** All 6 new tests passed on the first run without any production code changes, confirming the Task 1 implementation already handled all these cases correctly.