type: user

role: user

content:
Combined spec compliance + code quality review of Task 5 (tests-only addition). This is a tests-only diff so the two reviews collapse cleanly into one pass; do spec compliance first, then quality.

## Working Directory

`/Users/steve.briggs/projects/operations/.claude/worktrees/birdseye`

Diff: `git diff 67e6e70..03e7d39 -- apps/birdseye/internal/archive/`

## Spec — What Was Requested

Append 4 hardening test functions to `apps/birdseye/internal/archive/extract_test.go`:

1. `TestExtractZipSlip` — table-driven over `../evil.tf`, `./../../etc/passwd`, `a/../../etc/passwd`, asserts `errors.Is(err, ErrUnsafePath)`
2. `TestExtractAbsolutePath` — `/etc/passwd` → `errors.Is(err, ErrUnsafePath)`
3. `TestExtractTooLarge` — two 4-byte files with 5-byte cap → `errors.Is(err, ErrTooLarge)`
4. `TestExtractIgnoresSymlinks` — inline tar with TypeSymlink + TypeReg; symlink dropped, regular file retained

Commit message exactly: `test(birdseye): harden archive extraction (zip-slip, size cap, symlinks)`. Only `extract_test.go` staged. `extract.go` must NOT be modified.

## Spec Verification

Verify by reading the diff:

- All 4 functions added with the exact assertions and structure shown?
- Symlink test constructs the tar inline (does not reuse `buildTarGz`)?
- `errors` package imported if not already?
- No edits to `extract.go`?
- Commit message exact?

## Quality

If spec is ✓, briefly assess:
- Are subtests using `t.Run(name, ...)` correctly?
- Are tests independent?
- Does `TestExtractIgnoresSymlinks` correctly close `tw` then `gz` in order?
- Anything stylistically off (e.g., extra imports, dead helpers)?

## Report Format

**Spec:** ✅ compliant OR ❌ issues
**Quality:**
- Strengths: (1-2 bullets)
- Issues: Critical / Important / Minor
- Assessment: APPROVED | NEEDS_CHANGES

Be terse.

userType: external

entrypoint: cli

gitBranch: worktree-birdseye


content:
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type: attachment


type: message

role: assistant

Bash

command: git diff 67e6e70..03e7d39 -- apps/birdseye/internal/archive/

description: Get the diff for the archive package

type: direct

service_tier: standard

speed: standard

attributionAgent: general-purpose

attributionPlugin: superpowers

type: assistant


content:
diff --git a/apps/birdseye/internal/archive/extract_test.go b/apps/birdseye/internal/archive/extract_test.go
index 72dd31b..b83b700 100644
--- a/apps/birdseye/internal/archive/extract_test.go
+++ b/apps/birdseye/internal/archive/extract_test.go
@@ -4,6 +4,7 @@ import (
 	"archive/tar"
 	"bytes"
 	"compress/gzip"
+	"errors"
 	"testing"
 )

@@ -80,3 +81,76 @@ func TestExtractMalformedGzip(t *testing.T) {
 		t.Fatal("expected error on malformed input")
 	}
 }
+
+func TestExtractZipSlip(t *testing.T) {
+	cases := []string{
+		"../evil.tf",
+		"./../../etc/passwd",
+		"a/../../etc/passwd",
+	}
+	for _, name := range cases {
+		t.Run(name, func(t *testing.T) {
+			tgz := buildTarGz(t, map[string]string{name: "x"})
+			_, err := Extract(tgz, 1<<20)
+			if !errors.Is(err, ErrUnsafePath) {
+				t.Fatalf("expected ErrUnsafePath, got %v", err)
+			}
+		})
+	}
+}
+
+func TestExtractAbsolutePath(t *testing.T) {
+	tgz := buildTarGz(t, map[string]string{"/etc/passwd": "x"})
+	_, err := Extract(tgz, 1<<20)
+	if !errors.Is(err, ErrUnsafePath) {
+		t.Fatalf("expected ErrUnsafePath, got %v", err)
+	}
+}
+
+func TestExtractTooLarge(t *testing.T) {
+	// Cap of 5 bytes, two 4-byte files = 8 total -> over.
+	tgz := buildTarGz(t, map[string]string{"a.tf": "aaaa", "b.tf": "bbbb"})
+	_, err := Extract(tgz, 5)
+	if !errors.Is(err, ErrTooLarge) {
+		t.Fatalf("expected ErrTooLarge, got %v", err)
+	}
+}
+
+func TestExtractIgnoresSymlinks(t *testing.T) {
+	// Build a tar with a symlink entry plus a regular file. Symlinks
+	// should be silently dropped, the regular file should land in
+	// the output.
+	var buf bytes.Buffer
+	gz := gzip.NewWriter(&buf)
+	tw := tar.NewWriter(gz)
+	for _, hdr := range []*tar.Header{
+		{Name: "link.tf", Typeflag: tar.TypeSymlink, Linkname: "main.tf", Mode: 0o644},
+		{Name: "main.tf", Typeflag: tar.TypeReg, Size: 1, Mode: 0o644},
+	} {
+		if err := tw.WriteHeader(hdr); err != nil {
+			t.Fatal(err)
+		}
+		if hdr.Typeflag == tar.TypeReg {
+			if _, err := tw.Write([]byte("x")); err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+	if err := tw.Close(); err != nil {
+		t.Fatal(err)
+	}
+	if err := gz.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	mod, err := Extract(buf.Bytes(), 1<<20)
+	if err != nil {
+		t.Fatalf("Extract: %v", err)
+	}
+	if _, ok := mod.Files["link.tf"]; ok {
+		t.Error("symlink should have been dropped")
+	}
+	if _, ok := mod.Files["main.tf"]; !ok {
+		t.Error("regular file should be present")
+	}
+}


description: Check commit message


content: 03e7d3996a26588f8d5cbfc3f06aa60bdd2ea17f test(birdseye): harden archive extraction (zip-slip, size cap, symlinks)


description: Verify only extract_test.go was staged


type: text

text:
All checks done. Here is the report.

---

**Spec:** COMPLIANT

- All 4 functions present with exact names, assertions, and structure.
- `TestExtractZipSlip` is table-driven over all 3 specified paths using `t.Run(name, ...)`.
- `TestExtractAbsolutePath` uses `errors.Is(err, ErrUnsafePath)`.
- `TestExtractTooLarge` uses two 4-byte files with a 5-byte cap and `errors.Is(err, ErrTooLarge)`.
- `TestExtractIgnoresSymlinks` constructs the tar inline (does not reuse `buildTarGz`), drops the symlink, retains the regular file.
- `errors` package imported correctly.
- Only `extract_test.go` modified; `extract.go` untouched.
- Commit message exact match.

---

**Quality:**

- Strengths:
  - `TestExtractIgnoresSymlinks` closes `tw` before `gz` (correct flush order).
  - Tests are fully independent; no shared mutable state.

- Issues:
  - **Minor:** The `t.Run(name, ...)` subtests in `TestExtractZipSlip` iterate over a plain `[]string` — each subtest name will be the raw path string (e.g., `../evil.tf`). Go's testing framework escapes slashes and dots in subtest names, which can make `-run` filtering awkward but does not affect correctness.
  - **Minor:** The `TestExtractIgnoresSymlinks` inline comment block says "Build a tar with a symlink entry plus a regular file" — accurate and helpful. No dead helpers or unused imports.

- Assessment: **APPROVED**