Security suite failed (main @ db52d5f)

The root `mise run security` suite failed in GitHub Actions. Use the log tail below and reproduce locally with the same command.

| Field | Value |
| --- | --- |
| Workflow run | [Security #15](https://github.com/aws-samples/sample-autonomous-cloud-coding-agents/actions/runs/29251309033) |
| Ref | `refs/heads/main` |
| SHA | [`db52d5fa7f4d3b66b8f25202e690ae54e4270f13`](https://github.com/aws-samples/sample-autonomous-cloud-coding-agents/commit/db52d5fa7f4d3b66b8f25202e690ae54e4270f13) |
| Actor | @krokoko |
| Event | `schedule` |

### Log tail (last 200 lines)

```text
[//:security:secrets] $ gitleaks git . --no-banner --redact
12:50PM INF 811 commits scanned.
12:50PM INF scanned ~26025917 bytes (26.03 MB) in 3.22s
12:50PM INF no leaks found
[//:security:deps] $ osv-scanner scan --lockfile agent/uv.lock --lockfile yarn.lock
Starting filesystem walk for root: /
Scanned /home/runner/work/sample-autonomous-cloud-coding-agents/sample-autonomous-cloud-coding-agents/agent/uv.lock file and found 128 packages
Scanned /home/runner/work/sample-autonomous-cloud-coding-agents/sample-autonomous-cloud-coding-agents/yarn.lock file and found 1156 packages
End status: 0 dirs visited, 2 inodes visited, 2 Extract calls, 35.973331ms elapsed, 35.973511ms wall time

No issues found
[//:security:sast] $ semgrep scan --config auto --config p/python --config p/typescript --config p/owasp-top-ten --config p/security-audit --error --quiet .
[//:security:sast:masking] $ semgrep test .semgrep/
2/2: ✓ All tests passed
No tests for fixes found.
[//:security:sast:masking] $ mkdir -p test-reports
[//:security:sast:masking] $ semgrep scan --config .semgrep/silent-success-masking.yaml --exclude '.semgrep/*' --sarif-output=test-reports/semgrep-silent-success-masking.sarif --error --quiet .


┌─────────────────┐
│ 7 Code Findings │
└─────────────────┘

agent/src/config.py
❯❱ semgrep.py-silent-success-masking
❰❰ Blocking ❱❱
This except block swallows the error and returns an empty default, so the caller cannot distinguish
failure from a genuinely empty result (silent-success masking, AI004). Fix: re-raise (`raise`),
raise a typed error that adds context (`raise XError(...) from exc`), or return a result shape that
encodes the failure. Logging alone is not enough — the failure must reach the caller. If this
fallback is intentional degraded-mode behavior, keep it and add on the return line "# nosemgrep: py-
silent-success-masking -- ".

392┆ return ""
⋮┆----------------------------------------
406┆ return None
⋮┆----------------------------------------
428┆ return ""

agent/src/observability.py
❯❱ semgrep.py-silent-success-masking
❰❰ Blocking ❱❱
This except block swallows the error and returns an empty default, so the caller cannot distinguish
failure from a genuinely empty result (silent-success masking, AI004). Fix: re-raise (`raise`),
raise a typed error that adds context (`raise XError(...) from exc`), or return a result shape that
encodes the failure. Logging alone is not enough — the failure must reach the caller. If this
fallback is intentional degraded-mode behavior, keep it and add on the return line "# nosemgrep: py-
silent-success-masking -- ".

86┆ return None

cdk/src/handlers/shared/jira-feedback.ts
❯❱ semgrep.ts-silent-success-masking
❰❰ Blocking ❱❱
This catch block swallows the error and returns an empty default, so the caller cannot distinguish
failure from a genuinely empty result (silent-success masking, AI004). Fix: re-throw (`throw err;`),
throw a typed error that adds context, or return a result shape that encodes the failure. Logging
alone is not enough — the failure must reach the caller. If this fallback is intentional degraded-
mode behavior, keep it and add on the return line "// nosemgrep: ts-silent-success-masking -- ".

152┆ return null;

cli/src/commands/jira.ts
❯❱ semgrep.ts-silent-success-masking
❰❰ Blocking ❱❱
This catch block swallows the error and returns an empty default, so the caller cannot distinguish
failure from a genuinely empty result (silent-success masking, AI004). Fix: re-throw (`throw err;`),
throw a typed error that adds context, or return a result shape that encodes the failure. Logging
alone is not enough — the failure must reach the caller. If this fallback is intentional degraded-
mode behavior, keep it and add on the return line "// nosemgrep: ts-silent-success-masking -- ".

434┆ return null;

cli/src/commands/linear.ts
❯❱ semgrep.ts-silent-success-masking
❰❰ Blocking ❱❱
This catch block swallows the error and returns an empty default, so the caller cannot distinguish
failure from a genuinely empty result (silent-success masking, AI004). Fix: re-throw (`throw err;`),
throw a typed error that adds context, or return a result shape that encodes the failure. Logging
alone is not enough — the failure must reach the caller. If this fallback is intentional degraded-
mode behavior, keep it and add on the return line "// nosemgrep: ts-silent-success-masking -- ".

1630┆ return [];

[//:security:sast:masking] ERROR task failed
```

Close this issue after `mise run security` succeeds on `main` (or the branch you merge to).

agent/src/config.py、agent/src/observability.py、cdk/src/handlers/shared/jira-feedback.ts、cli/src/commands/jira.ts、cli/src/commands/linear.ts にある5つの findings から始めます。`mise run security` で再現し、サイレントな成功を隠している各結果を確認して、意図されたエラーハンドリングが明示的になるようにし、main にマージされた branch 上でコマンドが正常に完了するようにします。

索引モデルが issue の本文から書いたものです。