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fix(agent): stop the compact→retrieve→re-run infinite loop - #5257
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Included review availability: Your plan provides up to 10 included reviews per hour; 4 remain after this review. 📝 WalkthroughWalkthroughCache-miss messages in tokenjuice and system retrieval now discourage re-running oversized tool calls. They direct the model to use the compacted summary or retry with narrower arguments. Regression tests verify both messages. ChangesCCR retrieval behavior
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to The change prevents retrieve-miss loops and enables disk-backed recovery by default; no actionable merge-blocking risk remains based on the supplied evidence. Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Linked Issues checkExplanation The PR updates both retrieve surfaces, directs the model to use the compacted summary, avoids blind re-runs, preserves explicit configuration behavior, and adds regression coverage for issue
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Inline comments:
In `@src/openhuman/config/schema/tokenjuice.rs`:
- Around line 32-33: Add deserialization tests for the configuration struct
containing ccr_disk_enabled, covering both an omitted field resolving to true
through default_true and an explicitly provided false remaining false. Follow
the existing schema test patterns and assert both outcomes.
In `@src/openhuman/tokenjuice/tools.rs`:
- Around line 177-182: Update the assertion in
miss_message_does_not_instruct_a_blind_re_run so it cannot pass when the message
contains both affirmative and prohibitive re-run guidance. Assert the expected
no-loop guidance directly, or separately reject affirmative re-run wording while
requiring the “do not re-run” instruction.
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src/openhuman/config/schema/tokenjuice.rssrc/openhuman/tokenjuice/tools.rssrc/openhuman/tools/impl/system/retrieve_tool_output.rs
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| Filename | Overview |
|---|---|
| src/openhuman/config/schema/tokenjuice.rs | Flips ccr_disk_enabled default to true in both the Default impl and the serde field attribute; adds two tests that guard against the Default/serde split the previous review flagged. |
| src/openhuman/tokenjuice/tools.rs | Rewrites miss_message to explicitly forbid re-running; adds a test that lexically verifies every occurrence of re-run in the message is negated. |
| src/openhuman/tools/impl/system/retrieve_tool_output.rs | Mirrors the message change for the legacy retrieve_tool_output path; adds an async test asserting the miss response discourages re-running and points at the compacted summary. |
Flowchart
%%{init: {'theme': 'neutral'}}%%
flowchart TD
A[Tool produces large result] --> B[Compaction: summary + footer hash]
B --> C[Original offloaded to CCR store]
C --> D{Model calls retrieve_tool_output / tokenjuice_retrieve}
D -->|HIT| E[Return original ✓]
D -->|MISS - OLD behaviour| F["Error: re-run the tool"]
F --> A
D -->|MISS - NEW behaviour| G["Error: do NOT re-run\nProceed with compacted summary\n(or retry with narrower args)"]
G --> H[Model uses summary → bounded answer ✓]
style F fill:#f66,color:#fff
style G fill:#4a4,color:#fff
style H fill:#4a4,color:#fff
Reviews (2): Last reviewed commit: "fix(tokenjuice): default disk CCR on for..." | Re-trigger Greptile
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Tests for the default and the opt-out (CodeRabbit) — added. Vacuous assertion (CodeRabbit + greptile) — fixed, but not by dropping the first assert. Both of you were right that let mut cursor = 0;
while let Some(found) = msg[cursor..].find("re-run") {
let at = cursor + found;
assert!(msg[..at].trim_end().ends_with("do not"), "...");
cursor = at + "re-run".len();
}
Tests: |
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Maintainer review pass. The bug is real and the diagnosis is the good kind — a miss message that says "re-run the tool to regenerate it" against a result that is oversized by construction is a closed loop, and the live repro (parent re-delegating forever, run never reaching a terminal event) is the evidence that makes it more than a reading of the code. The message rewrite is clearly right, and I like that the test asserts every mention of re-running is the negated one rather than just grepping for "do not re-run". Two things before this can land. 1. The
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A large tool result is compacted to a summary plus a `retrieve_tool_output(hash)` / `⟦tj:hash⟧` marker, with the original offloaded to the CCR store. When the model later retrieves that hash and the store misses, the error told it to "re-run the tool to regenerate it" — so it re-ran, produced the same oversized result, which was compacted and offloaded again under a new hash that missed just as fast. On a live instance this made chat never answer: a parent agent re-delegated to a subagent forever on an evicted result, burning turns and cost with no reply. Two changes remove the loop: - The retrieve-miss message no longer instructs a blind re-run. It tells the model the original is gone, to NOT re-run the same call, and to proceed with the compacted summary it already has (retrying only with narrower arguments if a specific detail is essential). A worst case is now a slightly less detailed answer, not an unbounded loop. Applies to both `retrieve_tool_output` and `tokenjuice_retrieve`. - `ccr_disk_enabled` now defaults ON. The in-memory CCR store is FIFO-bounded (256 entries) and lost on restart, so a retrieve footer the model was handed can go stale within a single busy turn — the disk tier (TTL + size-cap gc'd) keeps those originals recoverable, so a compaction footer is a promise the store can actually keep. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SRSNnqQsokuGmkbpLoLCGy
…ed one
The miss-message assertion passed on a message that both forbade and
instructed a re-run: `contains("do not re-run")` is satisfied while a bare
"re-run the tool" sits elsewhere in the same string, which reads to the
model as permission and is exactly the loop this fixes.
Scan the message instead — every occurrence of "re-run" must be preceded
by "do not".
The `ccr_disk_enabled` default flip that used to ride along in this commit
is split out (see the PR discussion): it is a data-at-rest product decision
and does not belong in a loop fix.
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Rebased onto On the split. You said it wasn't yours to decide and that you weren't asking me to change it unprompted. Fair — but your reasoning for why it should be separate is right, and acting on it costs nothing: "tool results are now written to disk by default" is a data-at-rest change that deserves its own decision, and bundling it meant a reviewer had to accept both or neither. The loop fix now stands alone on its own merit, which is what you said would unblock it. The flip is not lost. It is exactly two hunks, preserved verbatim for whenever a maintainer wants to rule on it: --- a/src/openhuman/config/schema/tokenjuice.rs
@@ -21,7 +21,7 @@ pub struct TokenjuiceConfig {
- #[serde(default)]
+ #[serde(default = "default_true")]
pub ccr_disk_enabled: bool,
@@ -109,7 +109,7 @@ impl Default for TokenjuiceConfig {
- ccr_disk_enabled: false,
+ ccr_disk_enabled: true,plus two tests pinning that the On point 2, the conflicts. Three files, all from The bug is still live on // inference/tokenjuice/tools.rs:130
"tokenjuice_retrieve: no cached original for token '{token}' \
(it may have been evicted; re-run the tool to regenerate it)"and the same sentence at Verified locally: Thanks for the note on the negated-mention assertion, incidentally — that test now scans every occurrence of "re-run" and requires each to be preceded by "do not", rather than the weaker |
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How this change flows0 changed behaviours across 7 relationships. 6 surrounding behaviours are shown (60 graph nodes walked). 14 further behaviours left out to keep the diagram readable. flowchart LR
n0["execute"]:::impacted
n1["Value"]:::impacted
n2["execute"]:::impacted
n3["format"]:::impacted
n4["miss_message"]:::impacted
n5["filter"]:::impacted
n0 -->|uses| n1
n0 -->|calls| n4
n0 -->|calls| n5
n2 -->|uses| n1
n2 -->|calls| n3
n2 -->|calls| n5
n4 -->|calls| n3
classDef changed fill:#0d4429,stroke:#238636,color:#e6edf3
classDef impacted fill:#161b22,stroke:#6e7681,color:#c9d1d9
classDef flagged fill:#5a1e02,stroke:#d93f0b,color:#ffffff
classDef blocking fill:#67060c,stroke:#f85149,color:#ffffff
Green: changed behaviour. Grey: surrounding behaviour. Arrows name the call, use, implementation, or test relationship. Orange: has findings. Red: has a finding that blocks the merge. |
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Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
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Inline comments:
In `@src/openhuman/tools/impl/system/retrieve_tool_output_tests.rs`:
- Around line 37-42: Update the assertions in the retrieve-tool miss test to use
the cursor-based negation check from the tokenjuice tools tests, requiring “do
not” before every occurrence of “re-run” while accepting valid phrases such as
“Do not re-run the tool”; remove the separate broad phrase checks.
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Fix all unresolved CodeRabbit comments on this PR:
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📒 Files selected for processing (4)
src/openhuman/inference/tokenjuice/tools.rssrc/openhuman/inference/tokenjuice/tools_tests.rssrc/openhuman/tools/impl/system/retrieve_tool_output.rssrc/openhuman/tools/impl/system/retrieve_tool_output_tests.rs
🚧 Files skipped from review as they are similar to previous changes (1)
- src/openhuman/tools/impl/system/retrieve_tool_output.rs
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The `retrieve_tool_output` miss test still used the weaker exact-phrase
check while its `tokenjuice_retrieve` twin had been strengthened, which is
an asymmetry with real consequences in both directions:
`!contains("re-run the tool")` accepts a bare "re-run the same call"
elsewhere in the message — permission, as far as the model is concerned,
and the loop this PR fixes — and rejects the perfectly good "Do not re-run
the tool".
Use the same cursor scan as the tokenjuice test: every occurrence of
"re-run" must be preceded by "do not".
…\n\nfix(agent): stop the compact→retrieve→re-run infinite loop\n
3 participants
Summary
Chat could hang forever and never answer. A large tool result is compacted to a summary plus a
retrieve_tool_output(hash)/⟦tj:hash⟧marker, with the original offloaded to the CCR store. When the model later retrieved that hash and the store missed, the error told it to "re-run the tool to regenerate it" — so it re-ran, produced the same oversized result, which was compacted and offloaded again under a new hash that missed just as fast. Observed live: a parent agent re-delegated to a subagent forever on an evicted result, burning turns and cost with no reply.Two changes remove the loop:
retrieve_tool_outputandtokenjuice_retrieve.ccr_disk_enablednow defaults ON. The in-memory CCR store is FIFO-bounded (256 entries) and lost on restart, so a retrieve footer the model was handed can go stale within a single busy turn. The disk tier (TTL + size-cap gc'd) keeps those originals recoverable, so a compaction footer becomes a promise the store can actually keep. Existing configs that explicitly setfalseare unchanged.The subagent side (a specialist re-calling a succeeding tool with varied args) is already bounded by the iteration cap; the unbounded behaviour was the parent's re-delegation, which these changes stop.
Tests
retrieve_tool_output: addeda_cache_miss_does_not_tell_the_model_to_re_run(asserts the miss discourages re-running and points at the summary). 3 pass.tokenjuice_retrieve: addedmiss_message_does_not_instruct_a_blind_re_run. 4 pass.openhuman::config(427),openhuman::tinyagents::middleware(51),tools::implementations::system(187) — green.Validation
Reproduced and confirmed fixed on a live instance: before, the parent run never reached a terminal event and its
delegate_to_integrations_agentcount kept growing; after, delegation is bounded (2), the run reachesrun_completed, and the user gets a full itemised answer.Summary by CodeRabbit
Bug Fixes
Tests
Closes #5301