type: user

role: user

content:
Code quality review of Task 3: add `Download` method to Crow client.

## Working Directory

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

## Diff

```
BASE_SHA: 59cd0b6
HEAD_SHA: ee7794e
```

Run `git diff 59cd0b6..ee7794e -- services/crow/pkg/client/` to inspect the change.

## Context

Spec compliance is already ✓. Do NOT re-verify spec. Focus on quality.

The Crow client is a shared service-layer client used by `apps/crowctl` (existing) and `apps/birdseye` (being built). The crow service implements the Terraform module-registry protocol — `Download` follows a two-hop pattern: GET discovery endpoint (204 + `X-Terraform-Get` header) → GET the URL from the header.

The existing client code is at `services/crow/pkg/client/client.go`. The new method joins existing methods `Upload`, `Exists`, `ListVersions` in the same file.

## Review Focus

**Style consistency with existing client methods:**
- Does `Download` follow the same idioms as `Upload`/`Exists`/`ListVersions`? (Same validation pattern, same error wrapping style, same use of `c.httpClient.Do`?)
- Does the doc comment match the style of the other methods?

**Resource correctness:**
- Are both response bodies properly closed in every branch (404, non-204/200, missing header, blob non-200, success)?
- Does the success path leave the blob body open for the caller (as documented)?
- Any double-close or use-after-close bugs?

**Error handling:**
- Is `ErrNotFound` returned bare (so `errors.Is` works without unwrap)?
- Are wrapped errors formatted consistently (`fmt.Errorf("X %d Y", ...)`)?
- Is the missing-header error specific enough to be debuggable (mentions the path and status code)?

**Test quality:**
- Do tests exercise actual HTTP behavior (httptest, not mocks)?
- Are server handlers correctly asserting method and path?
- Are tests independent (each spins up its own server, no shared state)?
- Are the three tests genuinely covering distinct behaviors (happy, 404, missing-header)?

**Anti-patterns:**
- Magic strings (`X-Terraform-Get`, `application/octet-stream`)? If used in multiple places, consider extracting a constant.
- Method too long? `Download` is the longest method in the file — is the structure clear or could it be split?

**Per-task plan checks:**
- One clear responsibility: yes (single method, single file).
- File size: did Download materially grow `client.go`? (~30 lines added is fine.)

## Report Format

**Strengths:** (1-3 bullets)
**Issues:**
- Critical: (likely none)
- Important: (worth fixing now)
- Minor: (nice-to-haves)
**Assessment:** APPROVED | NEEDS_CHANGES

Be brief.

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

Skill

type: direct

service_tier: standard

speed: standard

attributionAgent: general-purpose

attributionPlugin: superpowers

type: assistant


content: Launching skill: superpowers:receiving-code-review


type: text

text:
Base directory for this skill: /Users/steve.briggs/.claude/plugins/cache/claude-plugins-official/superpowers/5.1.0/skills/receiving-code-review

# Code Review Reception

## Overview

Code review requires technical evaluation, not emotional performance.

**Core principle:** Verify before implementing. Ask before assuming. Technical correctness over social comfort.

## The Response Pattern

```
WHEN receiving code review feedback:

1. READ: Complete feedback without reacting
2. UNDERSTAND: Restate requirement in own words (or ask)
3. VERIFY: Check against codebase reality
4. EVALUATE: Technically sound for THIS codebase?
5. RESPOND: Technical acknowledgment or reasoned pushback
6. IMPLEMENT: One item at a time, test each
```

## Forbidden Responses

**NEVER:**
- "You're absolutely right!" (explicit CLAUDE.md violation)
- "Great point!" / "Excellent feedback!" (performative)
- "Let me implement that now" (before verification)

**INSTEAD:**
- Restate the technical requirement
- Ask clarifying questions
- Push back with technical reasoning if wrong
- Just start working (actions > words)

## Handling Unclear Feedback

```
IF any item is unclear:
  STOP - do not implement anything yet
  ASK for clarification on unclear items

WHY: Items may be related. Partial understanding = wrong implementation.
```

**Example:**
```
your human partner: "Fix 1-6"
You understand 1,2,3,6. Unclear on 4,5.

❌ WRONG: Implement 1,2,3,6 now, ask about 4,5 later
✅ RIGHT: "I understand items 1,2,3,6. Need clarification on 4 and 5 before proceeding."
```

## Source-Specific Handling

### From your human partner
- **Trusted** - implement after understanding
- **Still ask** if scope unclear
- **No performative agreement**
- **Skip to action** or technical acknowledgment

### From External Reviewers
```
BEFORE implementing:
  1. Check: Technically correct for THIS codebase?
  2. Check: Breaks existing functionality?
  3. Check: Reason for current implementation?
  4. Check: Works on all platforms/versions?
  5. Check: Does reviewer understand full context?

IF suggestion seems wrong:
  Push back with technical reasoning

IF can't easily verify:
  Say so: "I can't verify this without [X]. Should I [investigate/ask/proceed]?"

IF conflicts with your human partner's prior decisions:
  Stop and discuss with your human partner first
```

**your human partner's rule:** "External feedback - be skeptical, but check carefully"

## YAGNI Check for "Professional" Features

```
IF reviewer suggests "implementing properly":
  grep codebase for actual usage

  IF unused: "This endpoint isn't called. Remove it (YAGNI)?"
  IF used: Then implement properly
```

**your human partner's rule:** "You and reviewer both report to me. If we don't need this feature, don't add it."

## Implementation Order

```
FOR multi-item feedback:
  1. Clarify anything unclear FIRST
  2. Then implement in this order:
     - Blocking issues (breaks, security)
     - Simple fixes (typos, imports)
     - Complex fixes (refactoring, logic)
  3. Test each fix individually
  4. Verify no regressions
```

## When To Push Back

Push back when:
- Suggestion breaks existing functionality
- Reviewer lacks full context
- Violates YAGNI (unused feature)
- Technically incorrect for this stack
- Legacy/compatibility reasons exist
- Conflicts with your human partner's architectural decisions

**How to push back:**
- Use technical reasoning, not defensiveness
- Ask specific questions
- Reference working tests/code
- Involve your human partner if architectural

**Signal if uncomfortable pushing back out loud:** "Strange things are afoot at the Circle K"

## Acknowledging Correct Feedback

When feedback IS correct:
```
✅ "Fixed. [Brief description of what changed]"
✅ "Good catch - [specific issue]. Fixed in [location]."
✅ [Just fix it and show in the code]

❌ "You're absolutely right!"
❌ "Great point!"
❌ "Thanks for catching that!"
❌ "Thanks for [anything]"
❌ ANY gratitude expression
```

**Why no thanks:** Actions speak. Just fix it. The code itself shows you heard the feedback.

**If you catch yourself about to write "Thanks":** DELETE IT. State the fix instead.

## Gracefully Correcting Your Pushback

If you pushed back and were wrong:
```
✅ "You were right - I checked [X] and it does [Y]. Implementing now."
✅ "Verified this and you're correct. My initial understanding was wrong because [reason]. Fixing."

❌ Long apology
❌ Defending why you pushed back
❌ Over-explaining
```

State the correction factually and move on.

## Common Mistakes

| Mistake | Fix |
|---------|-----|
| Performative agreement | State requirement or just act |
| Blind implementation | Verify against codebase first |
| Batch without testing | One at a time, test each |
| Assuming reviewer is right | Check if breaks things |
| Avoiding pushback | Technical correctness > comfort |
| Partial implementation | Clarify all items first |
| Can't verify, proceed anyway | State limitation, ask for direction |

## Real Examples

**Performative Agreement (Bad):**
```
Reviewer: "Remove legacy code"
❌ "You're absolutely right! Let me remove that..."
```

**Technical Verification (Good):**
```
Reviewer: "Remove legacy code"
✅ "Checking... build target is 10.15+, this API needs 13+. Need legacy for backward compat. Current impl has wrong bundle ID - fix it or drop pre-13 support?"
```

**YAGNI (Good):**
```
Reviewer: "Implement proper metrics tracking with database, date filters, CSV export"
✅ "Grepped codebase - nothing calls this endpoint. Remove it (YAGNI)? Or is there usage I'm missing?"
```

**Unclear Item (Good):**
```
your human partner: "Fix items 1-6"
You understand 1,2,3,6. Unclear on 4,5.
✅ "Understand 1,2,3,6. Need clarification on 4 and 5 before implementing."
```

## GitHub Thread Replies

When replying to inline review comments on GitHub, reply in the comment thread (`gh api repos/{owner}/{repo}/pulls/{pr}/comments/{id}/replies`), not as a top-level PR comment.

## The Bottom Line

**External feedback = suggestions to evaluate, not orders to follow.**

Verify. Question. Then implement.

No performative agreement. Technical rigor always.


text: I'll read the diff and existing client code before forming any opinions.


Bash

command: git diff 59cd0b6..ee7794e -- services/crow/pkg/client/

description: Show diff for crow client changes


content:
diff --git a/services/crow/pkg/client/client.go b/services/crow/pkg/client/client.go
index 724664e..880ec67 100644
--- a/services/crow/pkg/client/client.go
+++ b/services/crow/pkg/client/client.go
@@ -132,3 +132,53 @@ func (c *Client) ListVersions(ctx context.Context, id api.ModuleIdentifier) ([]s
 		return nil, fmt.Errorf("unexpected status %d listing %s", resp.StatusCode, id.VersionsPath())
 	}
 }
+
+// Download fetches the gzipped tarball bytes for the given module
+// version. It follows the X-Terraform-Get redirect returned by Crow's
+// 204 response (per the Terraform module registry protocol). The caller
+// is responsible for closing the returned ReadCloser.
+//
+// Returns ErrNotFound on HTTP 404 from Crow.
+func (c *Client) Download(ctx context.Context, m api.Module) (io.ReadCloser, error) {
+	if err := m.Validate(); err != nil {
+		return nil, err
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, c.baseURL+m.DownloadPath(), nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	// The protocol uses 204 + X-Terraform-Get to point clients at the
+	// real artifact location (S3 presigned URL in production).
+	if resp.StatusCode == http.StatusNotFound {
+		_ = resp.Body.Close()
+		return nil, ErrNotFound
+	}
+	if resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusOK {
+		_ = resp.Body.Close()
+		return nil, fmt.Errorf("unexpected status %d resolving %s", resp.StatusCode, m.DownloadPath())
+	}
+	location := resp.Header.Get("X-Terraform-Get")
+	_ = resp.Body.Close()
+	if location == "" {
+		return nil, fmt.Errorf("crow returned %d with no X-Terraform-Get header for %s", resp.StatusCode, m.DownloadPath())
+	}
+
+	blobReq, err := http.NewRequestWithContext(ctx, http.MethodGet, location, nil)
+	if err != nil {
+		return nil, err
+	}
+	blobResp, err := c.httpClient.Do(blobReq)
+	if err != nil {
+		return nil, fmt.Errorf("fetching presigned blob: %w", err)
+	}
+	if blobResp.StatusCode != http.StatusOK {
+		_ = blobResp.Body.Close()
+		return nil, fmt.Errorf("unexpected status %d fetching blob %s", blobResp.StatusCode, location)
+	}
+	return blobResp.Body, nil
+}
diff --git a/services/crow/pkg/client/client_test.go b/services/crow/pkg/client/client_test.go
index 7ec5407..f8ff779 100644
--- a/services/crow/pkg/client/client_test.go
+++ b/services/crow/pkg/client/client_test.go
@@ -189,3 +189,67 @@ func TestListVersionsEmptyModulesIsNotFound(t *testing.T) {
 		t.Fatalf("expected ErrNotFound, got %v", err)
 	}
 }
+
+func TestDownloadOK(t *testing.T) {
+	mux := http.NewServeMux()
+	// Tarball server: serves the actual gzipped bytes.
+	tarball := []byte("fake-tarball-bytes")
+	tarSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/blob/iac/comply/aws/1.0.0.tar.gz" {
+			t.Errorf("tarball server got unexpected path: %s", r.URL.Path)
+		}
+		_, _ = w.Write(tarball)
+	}))
+	defer tarSrv.Close()
+
+	// Crow server: returns 204 + X-Terraform-Get pointing at tarSrv.
+	mux.HandleFunc("/v1/modules/iac/comply/aws/1.0.0/download", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet {
+			t.Errorf("expected GET, got %s", r.Method)
+		}
+		w.Header().Set("X-Terraform-Get", tarSrv.URL+"/blob/iac/comply/aws/1.0.0.tar.gz")
+		w.WriteHeader(http.StatusNoContent)
+	})
+	crowSrv := httptest.NewServer(mux)
+	defer crowSrv.Close()
+
+	cli := New(crowSrv.URL, WithHTTPClient(crowSrv.Client()))
+	rc, err := cli.Download(context.Background(), testModule())
+	if err != nil {
+		t.Fatalf("Download: %v", err)
+	}
+	defer rc.Close()
+	got, err := io.ReadAll(rc)
+	if err != nil {
+		t.Fatalf("read: %v", err)
+	}
+	if !bytes.Equal(got, tarball) {
+		t.Errorf("body = %q, want %q", got, tarball)
+	}
+}
+
+func TestDownloadNotFound(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		w.WriteHeader(http.StatusNotFound)
+	}))
+	defer srv.Close()
+
+	cli := New(srv.URL, WithHTTPClient(srv.Client()))
+	_, err := cli.Download(context.Background(), testModule())
+	if !errors.Is(err, ErrNotFound) {
+		t.Fatalf("expected ErrNotFound, got %v", err)
+	}
+}
+
+func TestDownloadMissingHeader(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		w.WriteHeader(http.StatusNoContent) // no X-Terraform-Get header
+	}))
+	defer srv.Close()
+
+	cli := New(srv.URL, WithHTTPClient(srv.Client()))
+	_, err := cli.Download(context.Background(), testModule())
+	if err == nil {
+		t.Fatal("expected error for missing X-Terraform-Get header")
+	}
+}


content:
1	// Package client is a reusable Crow HTTP client. It is used by apps/crowctl
2	// and is safe to use from tests (point it at an httptest.Server via
3	// WithHTTPClient or a localhost baseURL).
4	package client
5
6	import (
7		"context"
8		"encoding/json"
9		"errors"
10		"fmt"
11		"io"
12		"net/http"
13
14		"github.com/immuta/operations/services/crow/pkg/api"
15	)
16
17	type Client struct {
18		httpClient *http.Client
19		baseURL    string
20	}
21
22	type Option func(*Client)
23
24	// WithHTTPClient overrides the default *http.Client (useful for tests and
25	// for callers that want custom timeouts or transport).
26	func WithHTTPClient(h *http.Client) Option {
27		return func(c *Client) { c.httpClient = h }
28	}
29
30	// New constructs a Client pointed at baseURL (e.g. "https://crow.infrastructure.immuta.io").
31	// baseURL must not end in "/".
32	func New(baseURL string, opts ...Option) *Client {
33		c := &Client{baseURL: baseURL, httpClient: http.DefaultClient}
34		for _, opt := range opts {
35			opt(c)
36		}
37		return c
38	}
39
40	// Typed errors consumers can match with errors.Is.
41	var (
42		ErrAlreadyExists = errors.New("module version already exists")
43		ErrNotFound      = errors.New("module version not found")
44	)
45
46	// Upload PUTs the given gzipped-tar body for the module version. It returns
47	// ErrAlreadyExists on HTTP 409, nil on 201, and a generic error otherwise.
48	func (c *Client) Upload(ctx context.Context, m api.Module, body io.Reader) error {
49		if err := m.Validate(); err != nil {
50			return err
51		}
52		if err := api.ValidateVersion(m.Version); err != nil {
53			return err
54		}
55		req, err := http.NewRequestWithContext(ctx, http.MethodPut, c.baseURL+m.UploadPath(), body)
56		if err != nil {
57			return err
58		}
59		req.Header.Set("Content-Type", "application/octet-stream")
60		resp, err := c.httpClient.Do(req)
61		if err != nil {
62			return err
63		}
64		defer resp.Body.Close()
65		switch resp.StatusCode {
66		case http.StatusCreated:
67			return nil
68		case http.StatusConflict:
69			return ErrAlreadyExists
70		default:
71			return fmt.Errorf("unexpected status %d uploading %s", resp.StatusCode, m.UploadPath())
72		}
73	}
74
75	// Exists returns (true, nil) on 200 or 204, (false, nil) on 404, and an
76	// error for any other status.
77	func (c *Client) Exists(ctx context.Context, m api.Module) (bool, error) {
78		if err := m.Validate(); err != nil {
79			return false, err
80		}
81		req, err := http.NewRequestWithContext(ctx, http.MethodHead, c.baseURL+m.DownloadPath(), nil)
82		if err != nil {
83			return false, err
84		}
85		resp, err := c.httpClient.Do(req)
86		if err != nil {
87			return false, err
88		}
89		defer resp.Body.Close()
90		switch resp.StatusCode {
91		case http.StatusOK, http.StatusNoContent:
92			return true, nil
93		case http.StatusNotFound:
94			return false, nil
95		default:
96			return false, fmt.Errorf("unexpected status %d checking %s", resp.StatusCode, m.DownloadPath())
97		}
98	}
99
100	// ListVersions returns the module's version list in server order.
101	// Returns ErrNotFound when the module has no published versions.
102	func (c *Client) ListVersions(ctx context.Context, id api.ModuleIdentifier) ([]string, error) {
103		if err := id.Validate(); err != nil {
104			return nil, err
105		}
106		req, err := http.NewRequestWithContext(ctx, http.MethodGet, c.baseURL+id.VersionsPath(), nil)
107		if err != nil {
108			return nil, err
109		}
110		resp, err := c.httpClient.Do(req)
111		if err != nil {
112			return nil, err
113		}
114		defer resp.Body.Close()
115		switch resp.StatusCode {
116		case http.StatusOK:
117			var body api.ListVersionsResponse
118			if err := json.NewDecoder(resp.Body).Decode(&body); err != nil {
119				return nil, fmt.Errorf("decoding response: %w", err)
120			}
121			if len(body.Modules) == 0 {
122				return nil, ErrNotFound
123			}
124			out := make([]string, len(body.Modules[0].Versions))
125			for i, v := range body.Modules[0].Versions {
126				out[i] = v.Version
127			}
128			return out, nil
129		case http.StatusNotFound:
130			return nil, ErrNotFound
131		default:
132			return nil, fmt.Errorf("unexpected status %d listing %s", resp.StatusCode, id.VersionsPath())
133		}
134	}
135
136	// Download fetches the gzipped tarball bytes for the given module
137	// version. It follows the X-Terraform-Get redirect returned by Crow's
138	// 204 response (per the Terraform module registry protocol). The caller
139	// is responsible for closing the returned ReadCloser.
140	//
141	// Returns ErrNotFound on HTTP 404 from Crow.
142	func (c *Client) Download(ctx context.Context, m api.Module) (io.ReadCloser, error) {
143		if err := m.Validate(); err != nil {
144			return nil, err
145		}
146		req, err := http.NewRequestWithContext(ctx, http.MethodGet, c.baseURL+m.DownloadPath(), nil)
147		if err != nil {
148			return nil, err
149		}
150		resp, err := c.httpClient.Do(req)
151		if err != nil {
152			return nil, err
153		}
154
155		// The protocol uses 204 + X-Terraform-Get to point clients at the
156		// real artifact location (S3 presigned URL in production).
157		if resp.StatusCode == http.StatusNotFound {
158			_ = resp.Body.Close()
159			return nil, ErrNotFound
160		}
161		if resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusOK {
162			_ = resp.Body.Close()
163			return nil, fmt.Errorf("unexpected status %d resolving %s", resp.StatusCode, m.DownloadPath())
164		}
165		location := resp.Header.Get("X-Terraform-Get")
166		_ = resp.Body.Close()
167		if location == "" {
168			return nil, fmt.Errorf("crow returned %d with no X-Terraform-Get header for %s", resp.StatusCode, m.DownloadPath())
169		}
170
171		blobReq, err := http.NewRequestWithContext(ctx, http.MethodGet, location, nil)
172		if err != nil {
173			return nil, err
174		}
175		blobResp, err := c.httpClient.Do(blobReq)
176		if err != nil {
177			return nil, fmt.Errorf("fetching presigned blob: %w", err)
178		}
179		if blobResp.StatusCode != http.StatusOK {
180			_ = blobResp.Body.Close()
181			return nil, fmt.Errorf("unexpected status %d fetching blob %s", blobResp.StatusCode, location)
182		}
183		return blobResp.Body, nil
184	}
185


text: Now let me check the test file for existing patterns and whether `testModule()` is defined.


content:
1	package client
2
3	import (
4		"bytes"
5		"context"
6		"encoding/json"
7		"errors"
8		"io"
9		"net/http"
10		"net/http/httptest"
11		"testing"
12		"time"
13
14		"github.com/immuta/operations/services/crow/pkg/api"
15	)
16
17	func TestNewDefaults(t *testing.T) {
18		c := New("https://crow.example")
19		if c == nil {
20			t.Fatal("New returned nil")
21		}
22		if c.baseURL != "https://crow.example" {
23			t.Errorf("baseURL = %q", c.baseURL)
24		}
25		if c.httpClient == nil {
26			t.Error("httpClient should default to non-nil")
27		}
28	}
29
30	func TestWithHTTPClient(t *testing.T) {
31		custom := &http.Client{Timeout: time.Second}
32		c := New("https://crow.example", WithHTTPClient(custom))
33		if c.httpClient != custom {
34			t.Error("WithHTTPClient did not apply")
35		}
36	}
37
38	func testModule() api.Module {
39		return api.Module{
40			ModuleIdentifier: api.ModuleIdentifier{Namespace: "iac", Name: "comply", Provider: "aws"},
41			Version:          "1.0.0",
42		}
43	}
44
45	func TestExists(t *testing.T) {
46		cases := []struct {
47			name       string
48			status     int
49			wantExists bool
50			wantErr    bool
51		}{
52			{"204", http.StatusNoContent, true, false},
53			{"200", http.StatusOK, true, false},
54			{"404", http.StatusNotFound, false, false},
55			{"500", http.StatusInternalServerError, false, true},
56		}
57		for _, c := range cases {
58			t.Run(c.name, func(t *testing.T) {
59				srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
60					if r.Method != http.MethodHead {
61						t.Errorf("expected HEAD, got %s", r.Method)
62					}
63					if r.URL.Path != "/v1/modules/iac/comply/aws/1.0.0/download" {
64						t.Errorf("unexpected path: %s", r.URL.Path)
65					}
66					w.WriteHeader(c.status)
67				}))
68				defer srv.Close()
69
70				cli := New(srv.URL, WithHTTPClient(srv.Client()))
71				exists, err := cli.Exists(context.Background(), testModule())
72				if (err != nil) != c.wantErr {
73					t.Errorf("err = %v, wantErr %v", err, c.wantErr)
74				}
75				if exists != c.wantExists {
76					t.Errorf("exists = %v, want %v", exists, c.wantExists)
77				}
78			})
79		}
80	}
81
82	func TestUpload(t *testing.T) {
83		cases := []struct {
84			name    string
85			status  int
86			wantErr error
87		}{
88			{"201", http.StatusCreated, nil},
89			{"409", http.StatusConflict, ErrAlreadyExists},
90			{"500", http.StatusInternalServerError, errors.New("unexpected status")},
91		}
92		for _, c := range cases {
93			t.Run(c.name, func(t *testing.T) {
94				srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
95					if r.Method != http.MethodPut {
96						t.Errorf("expected PUT, got %s", r.Method)
97					}
98					if got := r.URL.Path; got != "/v1/modules/iac/comply/aws/1.0.0" {
99						t.Errorf("unexpected path: %s", got)
100					}
101					if got := r.Header.Get("Content-Type"); got != "application/octet-stream" {
102						t.Errorf("unexpected content-type: %s", got)
103					}
104					body, _ := io.ReadAll(r.Body)
105					if string(body) != "fake-tarball" {
106						t.Errorf("unexpected body: %s", body)
107					}
108					w.WriteHeader(c.status)
109				}))
110				defer srv.Close()
111
112				cli := New(srv.URL, WithHTTPClient(srv.Client()))
113				err := cli.Upload(context.Background(), testModule(), bytes.NewReader([]byte("fake-tarball")))
114				switch {
115				case c.wantErr == nil && err != nil:
116					t.Errorf("unexpected error: %v", err)
117				case c.wantErr != nil && err == nil:
118					t.Error("expected error, got nil")
119				case errors.Is(c.wantErr, ErrAlreadyExists) && !errors.Is(err, ErrAlreadyExists):
120					t.Errorf("expected ErrAlreadyExists, got %v", err)
121				default:
122					// wantErr matched err, or both nil: pass.
123				}
124			})
125		}
126	}
127
128	func testIdentifier() api.ModuleIdentifier {
129		return api.ModuleIdentifier{Namespace: "iac", Name: "comply", Provider: "aws"}
130	}
131
132	func TestListVersionsOK(t *testing.T) {
133		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
134			if r.Method != http.MethodGet {
135				t.Errorf("expected GET, got %s", r.Method)
136			}
137			if got := r.URL.Path; got != "/v1/modules/iac/comply/aws/versions" {
138				t.Errorf("unexpected path: %s", got)
139			}
140			_ = json.NewEncoder(w).Encode(api.ListVersionsResponse{
141				Modules: []api.ModuleVersions{
142					{Versions: []api.VersionEntry{{Version: "1.0.0"}, {Version: "1.1.0"}}},
143				},
144			})
145		}))
146		defer srv.Close()
147
148		cli := New(srv.URL, WithHTTPClient(srv.Client()))
149		got, err := cli.ListVersions(context.Background(), testIdentifier())
150		if err != nil {
151			t.Fatalf("ListVersions: %v", err)
152		}
153		want := []string{"1.0.0", "1.1.0"}
154		if len(got) != len(want) {
155			t.Fatalf("len = %d, want %d (got %v)", len(got), len(want), got)
156		}
157		for i := range got {
158			if got[i] != want[i] {
159				t.Errorf("got[%d] = %s, want %s", i, got[i], want[i])
160			}
161		}
162	}
163
164	func TestListVersionsNotFound(t *testing.T) {
165		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
166			w.WriteHeader(http.StatusNotFound)
167		}))
168		defer srv.Close()
169
170		cli := New(srv.URL, WithHTTPClient(srv.Client()))
171		_, err := cli.ListVersions(context.Background(), testIdentifier())
172		if !errors.Is(err, ErrNotFound) {
173			t.Fatalf("expected ErrNotFound, got %v", err)
174		}
175	}
176
177	// A 200 with an empty Modules array is semantically "no versions" and must
178	// surface as ErrNotFound, same as a 404. The current server always uses 404,
179	// but the contract needs to hold regardless.
180	func TestListVersionsEmptyModulesIsNotFound(t *testing.T) {
181		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
182			_ = json.NewEncoder(w).Encode(api.ListVersionsResponse{Modules: nil})
183		}))
184		defer srv.Close()
185
186		cli := New(srv.URL, WithHTTPClient(srv.Client()))
187		_, err := cli.ListVersions(context.Background(), testIdentifier())
188		if !errors.Is(err, ErrNotFound) {
189			t.Fatalf("expected ErrNotFound, got %v", err)
190		}
191	}
192
193	func TestDownloadOK(t *testing.T) {
194		mux := http.NewServeMux()
195		// Tarball server: serves the actual gzipped bytes.
196		tarball := []byte("fake-tarball-bytes")
197		tarSrv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
198			if r.URL.Path != "/blob/iac/comply/aws/1.0.0.tar.gz" {
199				t.Errorf("tarball server got unexpected path: %s", r.URL.Path)
200			}
201			_, _ = w.Write(tarball)
202		}))
203		defer tarSrv.Close()
204
205		// Crow server: returns 204 + X-Terraform-Get pointing at tarSrv.
206		mux.HandleFunc("/v1/modules/iac/comply/aws/1.0.0/download", func(w http.ResponseWriter, r *http.Request) {
207			if r.Method != http.MethodGet {
208				t.Errorf("expected GET, got %s", r.Method)
209			}
210			w.Header().Set("X-Terraform-Get", tarSrv.URL+"/blob/iac/comply/aws/1.0.0.tar.gz")
211			w.WriteHeader(http.StatusNoContent)
212		})
213		crowSrv := httptest.NewServer(mux)
214		defer crowSrv.Close()
215
216		cli := New(crowSrv.URL, WithHTTPClient(crowSrv.Client()))
217		rc, err := cli.Download(context.Background(), testModule())
218		if err != nil {
219			t.Fatalf("Download: %v", err)
220		}
221		defer rc.Close()
222		got, err := io.ReadAll(rc)
223		if err != nil {
224			t.Fatalf("read: %v", err)
225		}
226		if !bytes.Equal(got, tarball) {
227			t.Errorf("body = %q, want %q", got, tarball)
228		}
229	}
230
231	func TestDownloadNotFound(t *testing.T) {
232		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
233			w.WriteHeader(http.StatusNotFound)
234		}))
235		defer srv.Close()
236
237		cli := New(srv.URL, WithHTTPClient(srv.Client()))
238		_, err := cli.Download(context.Background(), testModule())
239		if !errors.Is(err, ErrNotFound) {
240			t.Fatalf("expected ErrNotFound, got %v", err)
241		}
242	}
243
244	func TestDownloadMissingHeader(t *testing.T) {
245		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
246			w.WriteHeader(http.StatusNoContent) // no X-Terraform-Get header
247		}))
248		defer srv.Close()
249
250		cli := New(srv.URL, WithHTTPClient(srv.Client()))
251		_, err := cli.Download(context.Background(), testModule())
252		if err == nil {
253			t.Fatal("expected error for missing X-Terraform-Get header")
254		}
255	}
256


text:
I have everything I need. Here is the review.

---

**Strengths:**

- Resource management is correct in every branch. The first response body is always closed before the function either returns an error or makes the second request. The blob body is left open for the caller exactly as documented. No double-close or use-after-close.
- `ErrNotFound` is returned bare (no wrapping), so `errors.Is` works without unwrap, consistent with `ListVersions`.
- Tests use real `httptest` servers, are fully independent (each starts its own server), and the happy-path test validates actual body bytes round-tripped through both hops.

**Issues:**

- **Important — `"X-Terraform-Get"` is a magic string used in two places** (production client and test handler). The existing file has a precedent for `"application/octet-stream"` also appearing as a magic string in `Upload`, so this is not a regression, but `Download` makes it worse by repeating the string across `client.go` and `client_test.go`. Worth extracting a package-level constant (`headerTerraformGet = "X-Terraform-Get"`) before this client grows further.

- **Important — style divergence on body-close idiom.** `Upload`, `Exists`, and `ListVersions` all use `defer resp.Body.Close()`. `Download` uses explicit `_ = resp.Body.Close()` calls, which is forced by the two-hop flow (you cannot defer and then read from a second response), but the first-hop body is closed twice implicitly if a reader isn't careful — actually it isn't, the code is correct. The real issue is that `Download` accepts both `http.StatusNoContent` and `http.StatusOK` from the discovery hop, yet `Exists` also accepts both. The `Download` uses `if/if` chaining to handle those two branches where a `switch` would match the style of the other methods. A `switch resp.StatusCode` block like `Exists` and `ListVersions` use would be more consistent and shorter.

- **Minor — `TestDownloadOK` uses `crowSrv.Client()` for both the Crow hop and the blob hop.** The blob request goes to `tarSrv` (a different server), not `crowSrv`. `httptest.Server.Client()` returns a client configured to trust the server's TLS cert; for plain `httptest.NewServer` (non-TLS) servers, the default transport works fine, so this doesn't fail, but it is conceptually misleading. The tarball fetch succeeds only because both are non-TLS. No actual bug here, but worth noting.

- **Minor — `TestDownloadMissingHeader` only asserts `err != nil`, not the error message content.** The missing-header error is explicitly designed to include the path and status code to be debuggable, but the test doesn't verify that. A `strings.Contains(err.Error(), "X-Terraform-Get")` or similar check would confirm the error message stays useful.

**Assessment:** APPROVED — the two "Important" items (magic string constant, switch-style consistency) are worth a quick follow-up but do not block merge.