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An agent’s “done” message is a claim, not evidence that the requested action ran or that its result was saved. Check the execution record, read the command or tool response, and inspect the destination—the file, message, database row, or deployed service. For coding tasks, a real test result can verify the claim; for consequential actions, require review or approval outside the agent’s own decision.
What “nothing ran” can mean
A task can appear complete for several different reasons, and the distinction matters when diagnosing it:
- The agent may have skipped a verification step, even if the surrounding process exited successfully.
- A tool may have returned an error while the process that called it still reported a zero exit code.
- A tool may have accepted a plausible-looking but invalid argument.
- The visible answer may be empty even though intended content was placed in a tool-call argument.
These possibilities were described in one author’s recorded experiment; they are examples, not evidence that every agent framework behaves this way. A separate troubleshooting guide identifies other useful hypotheses: an agent may mistake a command it emitted for a command whose result it read, treat partial completion as full success, or fail to resolve an error. These are diagnostic possibilities, not a measured taxonomy of how often failures occur.
How to check whether the task actually completed
- Make the claim specific. Write down what the agent says it changed, sent, tested, or published. “Done” is too broad to verify by itself.
- Check the execution record. Look at the tool or wire record to establish whether the expected operation was called. A quiet log or zero exit code does not prove that a separate verification step ran.
- Read the result. Inspect command output, tool responses, errors, and exit status. For a CI run, keep its evidence log instead of relying on the agent’s summary.
- Inspect the destination independently. Open the file, check the sent folder, query the relevant database row, or run the deployment health check. The artifact or destination state—not the completion prose—is the ground truth.
- Confirm scope and error resolution. Check that the agent did not silently narrow the task. Every meaningful error should have a concrete fix and a successful rerun before the task is treated as complete.
Choose a verification control that fits the work
Compare controls by what evidence they check, where the completion decision happens, and how serious or reversible a false completion would be. The available sources offer practical patterns, not a neutral benchmark establishing that one product or approach is best.
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| Tool-input validation | Whether arguments match defined types, enums, or known values | Workflows where a plausible but invalid tool argument could be accepted |
| Review or approval gate | A human review of completed work or explicit sign-off before completion | Publishing, billing, writing data, or other consequential side effects |
| Audit record at the tool boundary | A record of the operation and its outcome | Work where an independent record is important for accountability |
These controls are not interchangeable. A non-empty file does not prove its contents are correct; a test result does not necessarily prove a deployment is healthy. Match the evidence to the agent’s precise claim. Add process in proportion to the consequence of getting that claim wrong: a reversible, low-risk task may need a lightweight check, while an irreversible action may warrant explicit approval.
A CI pattern for coding-agent claims
The cngx guide describes a verification pattern that takes an agent’s claim and either runs a real command after -- or parses an existing evidence log, then compares the claim with the result. In the guide, exit code 0 means verified, 1 means blocked, and 2 means usage error. Its parser list includes pytest, unittest, jest/vitest, go test, cargo test, rspec, phpunit, dotnet test, mocha, Maven Surefire, and a generic exit-code fallback.
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The guide’s GitHub Actions example uses cngx v0.2.0. Check the project’s current version and behavior before relying on that implementation. The key principle is independent evidence: the gate should use an actual command result or retained log, rather than accepting the agent’s own statement that verification succeeded.
Use human gates for consequential task workflows
Grolea describes separate review and approval stages before its Paperclip platform marks a task done. Review checks completed work; approval requires explicit sign-off. This is vendor guidance about its own platform, not an independent comparison of task-management systems. Its practical distinction is useful: reviewing whether the work is complete and authorizing a consequential action are different decisions.
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What small experiments can—and cannot—show
SunnyDachs reports three runs per cell in a 2026 experiment and explicitly calls the result “A trend, not a statistical claim.” The reported framework comparisons used one model, had differences in sampling conditions and parameter descriptions, and simulated the irreversible operation. The results illustrate possible failure shapes; they do not establish a general failure rate or a reliable ranking of frameworks. No broad prevalence statistic or independently validated framework ranking is established by the cited material.
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