# Review Comment

- **Author:** coderabbitai[bot]
- **File:** `packages/core/ai_content_platform/vimax/agents/screenwriter.py`
- **Line:** 157
- **Date:** 2026-02-03
- **Comment ID:** 2756929084
- **URL:** https://github.com/donghaozhang/video-agent-skill/pull/16#discussion_r2756929084

---

_⚠️ Potential issue_ | _🟠 Major_

<details>
<summary>🧩 Analysis chain</summary>

🏁 Script executed:

```shell
find . -type f -name "screenwriter.py" | head -20
```

Repository: donghaozhang/video-agent-skill

Length of output: 214

---

🏁 Script executed:

```shell
fd "screenwriter.py" --type f
```

Repository: donghaozhang/video-agent-skill

Length of output: 210

---

🏁 Script executed:

```shell
git ls-files | grep -i screenwriter
```

Repository: donghaozhang/video-agent-skill

Length of output: 210

---

🏁 Script executed:

```shell
wc -l ./packages/core/ai_content_platform/vimax/agents/screenwriter.py
```

Repository: donghaozhang/video-agent-skill

Length of output: 142

---

🏁 Script executed:

```shell
sed -n '140,170p' ./packages/core/ai_content_platform/vimax/agents/screenwriter.py
```

Repository: donghaozhang/video-agent-skill

Length of output: 1237

---

🏁 Script executed:

```shell
rg -n "re.search.*\{.*\}" ./packages/core/ai_content_platform/vimax/agents/screenwriter.py -A 5 -B 5
```

Repository: donghaozhang/video-agent-skill

Length of output: 460

---

🏁 Script executed:

```shell
# Search for tests related to screenwriter or generate_screenplay
fd "test" -type f | xargs grep -l "generate_screenplay\|screenwriter" 2>/dev/null | head -10
```

Repository: donghaozhang/video-agent-skill

Length of output: 244

---

🏁 Script executed:

```shell
# Check the prompt being sent to understand expected response format
sed -n '1,150p' ./packages/core/ai_content_platform/vimax/agents/screenwriter.py | head -100
```

Repository: donghaozhang/video-agent-skill

Length of output: 2949

---

🏁 Script executed:

```shell
# Search for how prompts are constructed and what format is expected
rg "screenplay|JSON" ./packages/core/ai_content_platform/vimax/agents/screenwriter.py -B 3 -A 3
```

Repository: donghaozhang/video-agent-skill

Length of output: 1770

---

🏁 Script executed:

```shell
# Search for test files in the vimax directory
find ./packages/core/ai_content_platform/vimax -type f -name "*test*.py"
```

Repository: donghaozhang/video-agent-skill

Length of output: 56

---

🏁 Script executed:

```shell
# Search for any test or unit test directories
find ./packages/core/ai_content_platform -type d -name "*test*"
```

Repository: donghaozhang/video-agent-skill

Length of output: 115

---

🏁 Script executed:

```shell
# Check if there are any examples or usage of generate_screenplay
rg "generate_screenplay\|await.*writer\|Screenwriter\(" --type py -A 3 | head -50
```

Repository: donghaozhang/video-agent-skill

Length of output: 56

---

🏁 Script executed:

```shell
# List contents of test directory
ls -la ./packages/core/ai_content_platform/tests/ 2>/dev/null || echo "Directory not found or empty"
```

Repository: donghaozhang/video-agent-skill

Length of output: 491

---

🏁 Script executed:

```shell
# Search for screenwriter tests more thoroughly
find ./packages/core/ai_content_platform/tests -type f -name "*.py" | xargs grep -l "screenwriter\|Screenwriter" 2>/dev/null
```

Repository: donghaozhang/video-agent-skill

Length of output: 58

---

🏁 Script executed:

```shell
# Check the entire codebase for any JSON parsing issues or comments about this
rg "Could not parse screenplay" --type py
```

Repository: donghaozhang/video-agent-skill

Length of output: 204

---

🏁 Script executed:

````shell
# Look at how response.content is typically formatted - check for code-fence patterns
rg "```json|```\{" --type py | head -20
````

Repository: donghaozhang/video-agent-skill

Length of output: 2366

---

🏁 Script executed:

```shell
# Check integration and unit test directories
ls -la ./packages/core/ai_content_platform/tests/integration/
ls -la ./packages/core/ai_content_platform/tests/unit/
```

Repository: donghaozhang/video-agent-skill

Length of output: 631

---

🏁 Script executed:

```shell
# Look for any LLM response mocking or fixtures
rg "response.*content|mock.*LLM" ./packages/core/ai_content_platform/tests --type py -A 2 | head -30
```

Repository: donghaozhang/video-agent-skill

Length of output: 56

---

🏁 Script executed:

```shell
# Check how Claude or LLM responses are typically formatted in other agents
find ./packages/core/ai_content_platform/vimax/agents -name "*.py" -type f | xargs grep -l "response.content" | head -5
```

Repository: donghaozhang/video-agent-skill

Length of output: 282

---

🏁 Script executed:

```shell
# Look at character_extractor to see how it handles JSON extraction
sed -n '1,200p' ./packages/core/ai_content_platform/vimax/agents/character_extractor.py | grep -A 10 "response.content"
```

Repository: donghaozhang/video-agent-skill

Length of output: 711

---

🏁 Script executed:

```shell
# Check character_portraits for similar patterns
rg "response.content" ./packages/core/ai_content_platform/vimax/agents/character_portraits.py -A 10 | head -40
```

Repository: donghaozhang/video-agent-skill

Length of output: 424

---

🏁 Script executed:

```shell
# Search for any JSON extraction patterns in the codebase
rg "re.search.*\{" ./packages/core/ai_content_platform --type py -B 2 -A 5
```

Repository: donghaozhang/video-agent-skill

Length of output: 1768

---



</details>

**Use non-greedy matching or code-fence extraction for JSON parsing.**

The greedy regex `\{.*\}` can capture from the first brace to the last brace in the response, causing parse failures when LLM output contains multiple braced sections or code fences. Switch to non-greedy matching `\{.*?\}` or prioritize code-fence extraction (```json...```), with non-greedy fallback for robustness.

<details>
<summary>🧰 Proposed fix</summary>

```diff
-            match = re.search(r'\{.*\}', content, re.DOTALL)
-            if match:
-                data = json.loads(match.group())
-            else:
-                raise ValueError("Could not parse screenplay JSON")
+            json_text = None
+            fence_match = re.search(r"```(?:json)?\s*(\{.*?\})\s*```", content, re.DOTALL)
+            if fence_match:
+                json_text = fence_match.group(1)
+            else:
+                match = re.search(r"\{.*?\}", content, re.DOTALL)
+                if match:
+                    json_text = match.group()
+            if not json_text:
+                raise ValueError("Could not parse screenplay JSON")
+            data = json.loads(json_text)
```
</details>

<details>
<summary>🧰 Tools</summary>

<details>
<summary>🪛 Ruff (0.14.14)</summary>

[warning] 157-157: Abstract `raise` to an inner function

(TRY301)

---

[warning] 157-157: Avoid specifying long messages outside the exception class

(TRY003)

</details>

</details>

<details>
<summary>🤖 Prompt for AI Agents</summary>

````
In `@packages/core/ai_content_platform/vimax/agents/screenwriter.py` around lines
150 - 157, The current JSON extraction in screenwriter.py uses a greedy regex on
response.content (content) which can capture across multiple braced sections;
update the parsing in the block that assigns content/response to first look for
a ```json ... ``` code fence and extract the inner group (e.g., fence_match ->
json_text), and if not found fall back to a non-greedy regex like r"\{.*?\}" to
get the first JSON object, then validate json_text and pass it to json.loads
(refer to variables response, content, match, data in this function); raise the
same ValueError if no json_text is found.
````

</details>

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