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fix(agent): handle None content in context compressor (fixes #211)

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The OpenAI API returns content: null on assistant messages that only
contain tool calls. msg.get('content', '') returns None (not '') when
the key exists with value None, causing TypeError on len() and string
concatenation in _generate_summary and compress.

Fix: msg.get('content') or '' — handles both missing keys and None.

Tests from PR #216 (@Farukest). Fix also in PR #215 (@cutepawss).
Both PRs had stale branches and couldn't be merged directly.

Closes #211
This commit is contained in:
teknium1 2026-03-02 01:35:52 -08:00
parent afb680b50d
commit 25c65bc99e
2 changed files with 44 additions and 2 deletions
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4
agent/context_compressor.py
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@ -87,7 +87,7 @@ class ContextCompressor:
parts = []
for msg in turns_to_summarize:
role = msg.get("role", "unknown")
content = msg.get("content", "")
content = msg.get("content") or ""
if len(content) > 2000:
content = content[:1000] + "\n...[truncated]...\n" + content[-500:]
tool_calls = msg.get("tool_calls", [])
@ -193,7 +193,7 @@ Write only the summary, starting with "[CONTEXT SUMMARY]:" prefix."""
for i in range(compress_start):
msg = messages[i].copy()
if i == 0 and msg.get("role") == "system" and self.compression_count == 0:
msg["content"] = msg.get("content", "") + "\n\n[Note: Some earlier conversation turns may be summarized to preserve context space.]"
msg["content"] = (msg.get("content") or "") + "\n\n[Note: Some earlier conversation turns may be summarized to preserve context space.]"
compressed.append(msg)
compressed.append({"role": "user", "content": summary})