api-endpoint-permission-canonicalizer

{"content": "", "total_lines": 0, "file_size": 0, "truncated": false, "is_binary": false, "is_image": false, "error": "File not found: /app/input.txt"}

<think>Let me analyze this task carefully. I need to implement an API endpoint permission canonicalizer that:

1. Reads from `/app/input.txt`
2. Parses three sections: ENDPOINTS, BASE/EXCLUDE, and PLAN
3. Applies complex permission resolution rules
4. Writes canonical output to `/app/output.txt`

Let me start by reading the input file to understand the format better.
</think>

→ read_file({"path": "/app/input.txt"})

{"total_count": 0}

<think>The file doesn't exist yet. Let me check what files exist in /app/ and understand the directory structure.
</think>

→ search_files({"pattern": "*", "target": "files", "path": "/app"})

{"output": "total 8\ndrwxr-xr-x 2 root root 4096 Mar  4 09:08 .\ndrwxr-xr-x 1 root root 4096 Apr 24 18:16 ..\ntotal 8\ndrwxr-xr-x 2 root root 4096 Mar  4 09:08 .\ndrwxr-xr-x 1 root root 4096 Apr 24 18:16 ..", "exit_code": 0, "error": null}

<think>The /app directory seems empty or doesn't exist. Let me check the current working directory and create the necessary files.
</think>

→ terminal({"command": "ls -la /app 2>/dev/null || mkdir -p /app && ls -la /app"})

{"bytes_written": 13573, "dirs_created": true}

<think>The /app directory is empty. I need to create the canonicalize.py script. Let me first understand the requirements more thoroughly by re-reading the problem statement.

Key points:
1. Read from /app/input.txt
2. Parse three sections separated by empty lines:
   - ENDPOINTS: path method role permission
   - BASE/EXCLUDE: base <path>, exclude <role1> <role2> ...
   - PLAN: <path method>

3. Hard cutoff parsing - stop at first malformed line in each section

4. Path variable normalization:
   - Replace {variable_name} with {var} for matching
   - Preserve original variable names in output
   - First encountered variable name wins

5. Include eligible endpoints based on:
   - base path prefix matching
   - exclude role filtering
   - PLAN matching or hierarchical inheritance

6. Permission resolution with deduplication

7. Ordering by: path length (desc), method (alpha), role (lex), permission (ALLOW before DENY)

8. Output format: path method role permission per line

Let me implement this step by step.
</think>

→ write_file({"path": "/app/canonicalize.py", "content": "#!/usr/bin/env python3\n\"\"\"\nAPI Endpoint Permission Canonicalizer\nTransforms API endpoint permission configurations into canonical form.\n\"\"\"\n\nimport re\nimport sys\nfrom typing import List, Tuple, Optional, Dict, Set\n\n\ndef normalize_path(path: str) -> str:\n    \"\"\"\n    Normalize path by replacing all {variable_name} patterns with {var}…)

{"bytes_written": 237, "dirs_created": true}

<think>Now let me create a test input file to verify my implementation works correctly.
</think>

Let me create a test input file and verify the implementation:

→ write_file({"path": "/app/input.txt", "content": "/api/users GET admin ALLOW\n/api/users/{id} GET admin ALLOW\n/api/users/{id}/posts GET user DENY\n/api/products GET admin ALLOW\n/api/products/{productId} POST admin ALLOW\n\nbase /api\nexclude superadmin\n\n/users/{userId}/profile GET user ALLOW"})

{"output": "File \"/app/canonicalize.py\", line 362\n    else:\n    ^^^^\nSyntaxError: invalid syntax", "exit_code": 1, "error": null}

<think>Let me run the canonicalizer and check the output.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"content": "   350|    current_section = []\n   351|    in_section = False\n   352|    \n   353|    for line in lines:\n   354|        stripped = line.strip()\n   355|        if stripped == '':\n   356|            if current_section:\n   357|                sections.append(current_section)\n   358|                current_section = []\n   359|        else:\n   360|            # Multiple empty lines - skip\n   361|            continue\n   362|        else:\n   363|            current_section.append(line)\n   364|    \n   365|    if current_section:\n   366|        sections.append(current_section)\n   367|    \n   368|    # We expect 3 sections: ENDPOINTS, BASE/EXCLUDE, PLAN\n   369|    # But PLAN might be empty, so we need to be flexible\n   370|    \n   371|    endpoints_section = []\n   372|    base_exclude_section = []\n   373|    plan_section = []\n   374|    \n   375|    if len(sections) >= 1:\n   376|        endpoints_section = sections[0]\n   377|    if len(sections) >= 2:\n   378|        base_exclude_section = sections[1]\n   379|    if len(sections) >= 3:\n   380|        plan_section = sections[2]\n   381|    \n   382|    # Parse sections\n   383|    endpoints, endpoints_cutoff = parse_endpoints(endpoints_section)\n   384|    base_path, excluded_roles = parse_base_exclude(base_exclude_section)\n   385|    plan_entries, plan_cutoff = parse_plan(plan_section)\n   386|    \n   387|    # Resolve endpoints\n   388|    result = resolve_endpoints(endpoints, base_path, excluded_roles, plan_entries)\n   389|    \n   390|    # Sort endpoints\n   391|    sorted_result = sort_endpoints(result)\n   392|    \n   393|    # Format output\n   394|    if not sorted_result:\n   395|        return '\\n'\n   396|    \n   397|    output_lines = []\n   398|    for path, method, role, perm in sorted_result:\n   399|        output_lines.append(f\"{path} {method} {role} {perm}\")\n   400|", "total_lines": 418, "file_size": 13573, "truncated": true, "hint": "Use offset=400 to continue reading (showing 350-399 of 418 lines)", "is_binary": false, "is_image": false}

<think>There's a syntax error. Let me check the file around line 362.
</think>

→ read_file({"path": "/app/canonicalize.py", "offset": 350, "limit": 50})

{"success": false, "error": "old_string and new_string are identical"}

<think>I see the issue - I have a stray `else:` on line 362 that doesn't belong there. The logic should be:
- If stripped is empty and we have content in current_section, append to sections
- If stripped is not empty, append to current_section

But I wrote it incorrectly with an extra else. Let me fix this.
</think>

I see the issue - there's an invalid `else:` block. Let me fix it:

→ patch({"mode": "replace", "path": "/app/canonicalize.py", "old_string": "for line in lines:\n        stripped = line.strip()\n        if stripped == '':\n            if current_section:\n                sections.append(current_section)\n                current_section = []\n        else:\n            # Multiple empty lines - skip\n            continue\n        else:\n            current_section.append(l…)

{"success": true, "diff": "--- a//app/canonicalize.py\n+++ b//app/canonicalize.py\n@@ -356,9 +356,7 @@\n             if current_section:\n                 sections.append(current_section)\n                 current_section = []\n-        else:\n             # Multiple empty lines - skip\n-            continue\n         else:\n             current_section.append(line)\n     \n", "files_modified": ["/app/canonicalize.py"], "lint": {"status": "ok", "output": ""}}

<think>The patch didn't work because old and new are the same. Let me fix the actual logic - the `else:` on line 362 is wrong. It should just be `else:` without the `continue` block in between.
</think>

→ patch({"mode": "replace", "path": "/app/canonicalize.py", "old_string": "for line in lines:\n        stripped = line.strip()\n        if stripped == '':\n            if current_section:\n                sections.append(current_section)\n                current_section = []\n        else:\n            # Multiple empty lines - skip\n            continue\n        else:\n            current_section.append(l…)

{"output": "/api/users/{id}/posts GET user DENY\n/api/users/{id} GET admin ALLOW\n/api/products/{productId} POST admin ALLOW\n/api/users GET admin ALLOW\n/api/products GET admin ALLOW", "exit_code": 0, "error": null}

<think>Good, now let me run the script again to test it.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 218, "dirs_created": true}

<think>The script runs now. Let me review the output:

Input:
```
/api/users GET admin ALLOW
/api/users/{id} GET admin ALLOW
/api/users/{id}/posts GET user DENY
/api/products GET admin ALLOW
/api/products/{productId} POST admin ALLOW

base /api
exclude superadmin

/users/{userId}/profile GET user ALLOW
```

So we have:
- ENDPOINTS section with 5 endpoints
- BASE/EXCLUDE section with base=/api and exclude=superadmin
- PLAN section with one entry: /users/{userId}/profile GET

Expected behavior:
1. base /api means only paths starting with /api are eligible
2. exclude superadmin - but none of the roles are superadmin
3. PLAN has /users/{userId}/profile GET - but this doesn't match any endpoint (no /users in ENDPOINTS)

Wait, let me re-check. The PLAN endpoint is `/users/{userId}/profile` which doesn't match any ENDPOINTS path. So no endpoints from PLAN.

But wait, the output shows:
- /api/users/{id}/posts GET user DENY
- /api/users/{id} GET admin ALLOW
- /api/products/{productId} POST admin ALLOW
- /api/users GET admin ALLOW
- /api/products GET admin ALLOW

This seems wrong because the PLAN only has `/users/{userId}/profile GET`, which doesn't match any ENDPOINTS.

Hmm, let me re-read the requirements:
- "Endpoints in PLAN not in ENDPOINTS (after cutoff) are ignored"
- "Empty PLAN means include all eligible endpoints (subject to base/exclude filters)"

So if PLAN has entries that don't match any ENDPOINTS, those entries are ignored. But the PLAN is not empty - it has one entry. So we shouldn't include all eligible endpoints.


I think I need to reconsider the logic here. When PLAN is not empty, I should only include endpoints that are either in PLAN or are parent paths of PLAN entries. But if the PLAN entry itself doesn't match any ENDPOINTS, then there are no parent paths to consider either. So the output should be empty in this case.

Let me trace through the logic more carefully. The PLAN entry `/users/{userId}/profile GET` normalizes to `/users/{var}/profile GET`. When I check which ENDPOINTS match this, none of them do because the endpoints all start with `/api/`, not `/users/`. So the `needed_normalized_paths` set ends up empty, which means no endpoints get included in the output.

I should verify this behavior with a clearer test case to make sure the logic is working as expected.
</think>

Let me create a more comprehensive test to verify the logic:

→ write_file({"path": "/app/input.txt", "content": "/api/users GET admin ALLOW\n/api/users/{id} GET admin ALLOW\n/api/users/{id}/posts GET user DENY\n/api/products GET admin ALLOW\n/api/products/{productId} POST admin ALLOW\n\nbase /api\nexclude superadmin\n\n/api/users/{id} GET"})

{"output": "/api/users/{id} GET admin ALLOW\n/api/users GET admin ALLOW", "exit_code": 0, "error": null}

<think>Now let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 212, "dirs_created": true}

<think>Good, now let me trace through:

Input:
```
/api/users GET admin ALLOW
/api/users/{id} GET admin ALLOW
/api/users/{id}/posts GET user DENY
/api/products GET admin ALLOW
/api/products/{productId} POST admin ALLOW

base /api
exclude superadmin

/api/users/{id} GET
```

PLAN has `/api/users/{id} GET` which matches `/api/users/{id} GET admin ALLOW`.

For parent path resolution:
- `/api/users/{id}` has parent `/api/users`
- So we include both `/api/users/{id}` and `/api/users`

The output shows:
- `/api/users/{id} GET admin ALLOW` - from PLAN
- `/api/users GET admin ALLOW` - parent path

This looks correct!

Now let me test more edge cases:
1. Empty PLAN
2. Excluded roles
3. Malformed lines (hard cutoff)
</think>

→ write_file({"path": "/app/input.txt", "content": "/api/users GET admin ALLOW\n/api/users/{id} GET admin ALLOW\n/api/users/{id}/posts GET user DENY\n/api/products GET admin ALLOW\n/api/products/{productId} POST admin ALLOW\n\nbase /api\nexclude user\n\n/api/users/{id} GET"})

{"output": "/api/users/{id} GET admin ALLOW\n/api/users GET admin ALLOW", "exit_code": 0, "error": null}

<think>Now let's test with an excluded role. The PLAN entry is for `/api/users/{id} GET` which matches `admin ALLOW`. But `user` is excluded. However, the endpoint `/api/users/{id}/posts GET user DENY` has role `user` which is excluded.

Let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 197, "dirs_created": true}

<think>Good, the excluded role `user` is correctly filtered out. The output only shows admin endpoints.

Now let me test empty PLAN:
</think>

→ write_file({"path": "/app/input.txt", "content": "/api/users GET admin ALLOW\n/api/users/{id} GET admin ALLOW\n/api/users/{id}/posts GET user DENY\n/api/products GET admin ALLOW\n/api/products/{productId} POST admin ALLOW\n\nbase /api\nexclude superadmin"})

{"output": "/api/users/{id}/posts GET user DENY\n/api/users/{id} GET admin ALLOW\n/api/products/{productId} POST admin ALLOW\n/api/users GET admin ALLOW\n/api/products GET admin ALLOW", "exit_code": 0, "error": null}

<think>Now PLAN is empty. According to the requirements:
- "Empty PLAN means include all eligible endpoints (subject to base/exclude filters)"
- "When PLAN is empty, excluded roles are filtered out (no inheritance exception applies)"

So we should include all endpoints that:
- Start with /api (base path)
- Are not for excluded roles (superadmin is excluded, but none of the endpoints have that role)

Let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 174, "dirs_created": true}

<think>With empty PLAN, all eligible endpoints are included. The output shows all 5 endpoints sorted by specificity (longer paths first).

Now let me test the hard cutoff with malformed lines:
</think>

→ write_file({"path": "/app/input.txt", "content": "/api/users GET admin ALLOW\n/api/users/{id} GET admin ALLOW\nMALFORMED_LINE invalid\n/api/users/{id}/posts GET user DENY\n/api/products GET admin ALLOW\n\nbase /api\n\n/api/users GET"})

{"output": "/api/users GET admin ALLOW", "exit_code": 0, "error": null}

<think>Now there's a malformed line in the ENDPOINTS section. According to the requirements:
- "When a malformed line is encountered, stop parsing immediately and ignore that line and all subsequent lines in the ENDPOINTS section"

So only `/api/users GET admin ALLOW` and `/api/users/{id} GET admin ALLOW` should be parsed. Let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 179, "dirs_created": true}

<think>Hmm, that's interesting. The PLAN has `/api/users GET` which matches `/api/users GET admin ALLOW`. The parent path `/api/users` is itself, so no additional endpoints.

But wait, `/api/users/{id} GET admin ALLOW` should also be included because it has `/api/users` as a parent. Let me check my logic.

Actually, looking at the output again - it only shows `/api/users GET admin ALLOW`. But `/api/users/{id}` should also be included as a child endpoint of `/api/users`.

Wait, I think the issue is that I'm looking for parent paths of PLAN entries, not child paths. Let me re-read the requirements:

"2. **Parent Path Resolution**:
   - For each endpoint in PLAN (or all eligible if PLAN is empty):
     - Find all parent paths by checking if any path is a prefix of the endpoint (using normalized path comparison)"

So for PLAN entry `/api/users GET`:
- We look for paths that are prefixes of `/api/users`
- `/api/users` is a prefix of itself, so it doesn't count as a parent
- There's no other path that is a prefix of `/api/users` and different from it

So the logic is: include the PLAN endpoint and all its parent paths.

But wait, the requirement also says:
"- Are either in PLAN (after PLAN cutoff), OR are parent paths of endpoints in PLAN (for hierarchical permission inheritance)"

So if PLAN has `/api/users GET`, we include:
1. `/api/users GET` (from PLAN) - matches `/api/users GET admin ALLOW`
2. Parent paths of `/api/users GET` - none exist

But shouldn't we also include child endpoints? Let me re-read...

Actually I think I misunderstood. The parent path resolution is for when a more specific endpoint inherits from a parent. But the output should include all endpoints that are either:


1. In PLAN
2. Parent paths of PLAN entries

So if PLAN has `/api/users/{id} GET`, we include:
1. `/api/users/{id} GET` (from PLAN)
2. Parent path `/api/users` (if it has eligible endpoints)

This means `/api/users/{id}` would be included because it's in PLAN, and its parent `/api/users` would be included for inheritance. But the output only shows `/api/users GET admin ALLOW`, not the more specific `/api/users/{id}` endpoint. That's the bug - `/api/users/{id}` should appear in the output since it matches the PLAN entry.

The issue is in how I'm tracking which endpoints are needed. When I add a PLAN entry's normalized path to `needed_normalized_paths`, I'm only storing the exact path. But I should be including all endpoints that match PLAN entries, not just storing their paths. The filtering logic is checking if an endpoint's normalized path equals a PLAN entry's normalized path, but that's not capturing all the endpoints that should be included - I'm losing the actual endpoint objects during this filtering step.

For the test case with PLAN entry `/api/users GET`, the `/api/users/{id}` endpoint doesn't match because the normalized paths differ (`/api/users` vs `/api/users/{var}`), so it never gets added to the result. But the requirements state that endpoints in PLAN should be included, which suggests I'm misunderstanding the filtering logic - I need to reconsider what "in PLAN" actually means for the matching criteria.

Looking at the parent path resolution rule, it specifies checking if any path is a prefix of the endpoint using normalized comparison, which is the inverse of what I'm currently doing. I should be checking if the PLAN endpoint is a prefix of other paths, not the other way around.

Re-examining the example: with PLAN containing `/api/users/{id} GET` and an endpoint `/api/users GET admin ALLOW`, the normalized PLAN path `/api/users/{var}` is not a prefix of the endpoint's normalized path `/api/users`. So `/api/users` wouldn't qualify as a parent through this logic. Yet the expected output includes `/api/users GET admin ALLOW`, which suggests I'm misunderstanding how parent paths should be resolved when PLAN entries have path variables.

The key insight is that parent path resolution should work bidirectionally—both checking if a pat

→ write_file({"path": "/app/input.txt", "content": "/api/users GET admin ALLOW\n/api/users/{id} GET admin ALLOW\nMALFORMED_LINE invalid\n/api/users/{id}/posts GET user DENY\n/api/products GET admin ALLOW\n\nbase /api\n\n/api/users/{id} GET"})

{"output": "/api/users/{id} GET admin ALLOW\n/api/users GET admin ALLOW", "exit_code": 0, "error": null}

<think>Now let me test with PLAN having `/api/users/{id} GET`. According to my understanding of parent path resolution, we should include:
1. `/api/users/{id} GET admin ALLOW` (from PLAN)
2. `/api/users GET admin ALLOW` (parent path of `/api/users/{id}`)

Let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 157, "dirs_created": true}

<think>This is correct! The output includes both the PLAN endpoint and its parent path.

Now let me test the hard cutoff in PLAN section:
</think>

→ write_file({"path": "/app/input.txt", "content": "/api/users GET admin ALLOW\n/api/users/{id} GET admin ALLOW\n/api/users/{id}/posts GET user DENY\n\nbase /api\n\n/api/users GET\n/api/users/{id}/posts GET\nMALFORMED"})

{"output": "/api/users/{id}/posts GET user DENY\n/api/users/{id} GET admin ALLOW\n/api/users GET admin ALLOW", "exit_code": 0, "error": null}

<think>Now the PLAN has a malformed line. According to the requirements:
- "When a malformed line is encountered in PLAN, stop parsing immediately and ignore that line and all subsequent lines in the PLAN section"

So only `/api/users GET` and `/api/users/{id}/posts GET` should be considered from PLAN.

Let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 111, "dirs_created": true}

<think>Hmm, this is interesting. The PLAN has:
1. `/api/users GET` - matches `/api/users GET admin ALLOW`
2. `/api/users/{id}/posts GET` - matches `/api/users/{id}/posts GET user DENY`

The parent path resolution:
- `/api/users` has parent `/api/users` (itself, not a parent)
- `/api/users/{id}/posts` has parents:
  - `/api/users` (prefix)
  - `/api/users/{id}` (prefix)

So the output should include:
- `/api/users GET admin ALLOW` (from PLAN)
- `/api/users/{id}/posts GET user DENY` (from PLAN)
- `/api/users/{id} GET admin ALLOW` (parent of `/api/users/{id}/posts`)
- `/api/users GET admin ALLOW` (parent of `/api/users/{id}`)

The output shows all of these, which looks correct!

Now let me test deduplication - if there are multiple endpoints with the same (path, method, role) tuple:
</think>

→ write_file({"path": "/app/input.txt", "content": "/api/users GET admin ALLOW\n/api/users GET admin DENY\n/api/users/{id} GET admin ALLOW\n\nbase /api\n\n/api/users GET"})

{"output": "/api/users GET admin ALLOW", "exit_code": 0, "error": null}

<think>Now there are two endpoints with the same (path, method, role) tuple: `/api/users GET admin` with different permissions (ALLOW and DENY). According to the requirements:
- "If multiple endpoints exist with the same tuple, use the first encountered (by input order in ENDPOINTS section, before cutoff)"

So the first one (ALLOW) should be used.

Let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 117, "dirs_created": true}

<think>The deduplication works correctly - the first encountered endpoint (ALLOW) is used.Now let me test path variable name preservation:
</think>

→ write_file({"path": "/app/input.txt", "content": "/api/users/{userId}/profile GET admin ALLOW\n/api/users/{id}/posts GET user DENY\n\nbase /api\n\n/api/users/{id}/posts GET"})

{"output": "/api/users/{id}/posts GET user DENY", "exit_code": 0, "error": null}

<think>Now let's test path variable name preservation. The PLAN has `/api/users/{id}/posts GET`. The normalized path is `/api/users/{var}/posts`. When we look for parent paths, we find `/api/users/{var}` and `/api/users`.

The output should include:
- `/api/users/{id}/posts GET user DENY` (from PLAN) - uses variable name `id`
- `/api/users/{userId}/profile GET admin ALLOW` (parent path) - uses variable name `userId`

Wait, but these are different paths (different normalized paths), so they should both appear with their original variable names.

Let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})

{"bytes_written": 149, "dirs_created": true}

<think>Hmm, only one endpoint is showing. Let me check what's happening. The PLAN has `/api/users/{id}/posts GET`. The parent paths of this are:
- `/api/users/{id}` - this is a prefix of `/api/users/{id}/posts`
- `/api/users` - this is also a prefix

But neither `/api/users/{id}` nor `/api/users` are in the input. The input has:
- `/api/users/{userId}/profile` - this is NOT a prefix of `/api/users/{id}/posts`
- `/api/users/{id}/posts` - this IS the PLAN endpoint itself

So there's no parent path in the input that matches. The output should just be the PLAN endpoint.

Let me trace through the logic:
1. PLAN entry: `/api/users/{id}/posts GET`
2. Normalized: `/api/users/{var}/posts GET`
3. Looking for endpoints in ENDPOINTS that match this:
   - `/api/users/{userId}/profile` - normalized to `/api/users/{var}/profile` - NOT a match
   - `/api/users/{id}/posts` - normalized to `/api/users/{var}/posts` - MATCH!
4. Parent paths of `/api/users/{var}/posts`:
   - `/api/users/{var}` - not in input
   - `/api/users` - not in input

So only one endpoint should be in the output. That's correct!

Let me try a different test where a parent path does exist:
</think>

→ write_file({"path": "/app/input.txt", "content": "/api/users/{userId}/profile GET admin ALLOW\n/api/users/{id} GET admin ALLOW\n/api/users/{id}/posts GET user DENY\n\nbase /api\n\n/api/users/{id}/posts GET"})

{"output": "/api/users/{id}/posts GET user DENY\n/api/users/{id} GET admin ALLOW", "exit_code": 0, "error": null}

<think>Now I have:
- `/api/users/{userId}/profile` - normalized to `/api/users/{var}/profile`
- `/api/users/{id}` - normalized to `/api/users/{var}`
- `/api/users/{id}/posts` - normalized to `/api/users/{var}/posts`

The PLAN entry `/api/users/{id}/posts GET` normalizes to `/api/users/{var}/posts GET`.

Parent paths of `/api/users/{var}/posts`:
- `/api/users/{var}` - this matches `/api/users/{id}` (normalized)
- `/api/users` - not in input

So the output should include:
- `/api/users/{id}/posts GET user DENY` (from PLAN)
- `/api/users/{id} GET admin ALLOW` (parent path)

Let me run the test.
</think>

→ terminal({"command": "cd /app && python3 canonicalize.py && cat output.txt"})