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agents: log oversized prompts to llm-logs/oversized/ for debugging

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When a prompt exceeds the size guard, dump it to a timestamped file
with agent name, size, and seed node keys. Makes it easy to find
which nodes are blowing up prompts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Kent Overstreet 2026-03-20 14:38:32 -04:00
parent 3a8575b429
commit 0c687ae7a4
1 changed files with 10 additions and 0 deletions
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10
poc-memory/src/agents/knowledge.rs
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@ -143,6 +143,16 @@ fn run_one_agent_inner(
// Rough estimate: 1 token ≈ 4 bytes. Reserve 16K tokens for output. // Rough estimate: 1 token ≈ 4 bytes. Reserve 16K tokens for output.
let max_prompt_bytes = 800_000; // ~200K tokens, leaves room for output let max_prompt_bytes = 800_000; // ~200K tokens, leaves room for output
if agent_batch.prompt.len() > max_prompt_bytes { if agent_batch.prompt.len() > max_prompt_bytes {
// Log the oversized prompt for debugging
let oversize_dir = store::memory_dir().join("llm-logs").join("oversized");
fs::create_dir_all(&oversize_dir).ok();
let oversize_path = oversize_dir.join(format!("{}-{}.txt",
agent_name, store::compact_timestamp()));
let header = format!("=== OVERSIZED PROMPT ===\nagent: {}\nsize: {}KB (max {}KB)\nnodes: {:?}\n\n",
agent_name, prompt_kb, max_prompt_bytes / 1024, agent_batch.node_keys);
fs::write(&oversize_path, format!("{}{}", header, agent_batch.prompt)).ok();
log(&format!("oversized prompt logged to {}", oversize_path.display()));
return Err(format!( return Err(format!(
"prompt too large: {}KB (max {}KB) — seed nodes may be oversized", "prompt too large: {}KB (max {}KB) — seed nodes may be oversized",
prompt_kb, max_prompt_bytes / 1024, prompt_kb, max_prompt_bytes / 1024,