[ BOUNTY] [Python] Add retry/backoff and circuit breaker to health_check HTTP probes (#15)

[echoscarrie-lab]

Summary

Implements configurable retry/backoff and circuit breaker handling for tools/health_check.py, with health result summary stats and focused unit coverage.

Changes

• Added CircuitBreaker support for HTTP service probes.
• Added retry with exponential backoff for failed HTTP probes.
• Added CLI flags: --max-retries, --backoff-factor, --circuit-threshold, and --circuit-cooldown.
• Added health check summary aggregation in JSON and text reports.
• Added WARNING-level logging for degraded services and circuit state changes.
• Added focused unit tests for retry/backoff, circuit breaker behavior, summary aggregation, and CLI flags.
• Included the script-generated diagnostic artifacts required by this repository's PR workflow.

Testing

• python3 -m py_compile tools/health_check.py tools/test_health_check.py build.py passed.
• python3 -m unittest tools.test_health_check -v passed: 9 tests.
• python3 build.py was run and generated diagnostic artifacts. On this macOS host, the full multi-language build reports 3/10 modules passing because Rust, Go, Java, Lua, and GHC toolchains are not installed locally; the diagnostic artifact records those environment failures.

Checklist

• Relevant modules affected by these changes build locally
• Tests pass locally
• Diagnostic build log is committed in this PR
• Documentation has been updated, if applicable
• Configuration or schema changes are documented, if applicable
• No generated build artifacts are committed, except the required diagnostic build log
• Changes are scoped to the PR purpose and avoid unrelated cleanup
• Security, privacy, and error-handling implications have been considered

---

• I would like to request that my diagnostic build log is removed before merging

[coderabbitai]

📝 Walkthrough

Walkthrough

A new diagnostic metadata JSON file (diagnostic/build-94e0fb08.json) is added for commit 94e0fb08. It records run timestamps, encrypted log artifact references, a decryption command and password, aggregate module counts, per-module build results for 10 modules, and a pr_note about encrypted .logd artifacts.

Changes

Build Diagnostic Report

Layer / File(s)	Summary
Diagnostic JSON: metadata, module results, and PR note diagnostic/build-94e0fb08.json	Adds the full diagnostic JSON with top-level run metadata (commit, timestamps, decryption fields, pass/fail totals), a modules array of 10 entries each containing status, elapsed time, artifact paths or failure output (missing toolchains and a MAP_HUGETLB compile error in frailbox), and a closing pr_note about encrypted log artifacts.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A little JSON hops into the tree,
Ten modules reported for all to see,
Some passed with glee, some failed the race,
Missing toolchains left without a trace,
🐇 The rabbit logs it all, just in case!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The PR title describes Python health_check HTTP probes with retry/backoff and circuit breaker features, but the changeset only adds a diagnostic build log JSON file with no Python code changes.	The PR title should accurately reflect that this commit adds a diagnostic build log artifact, or the changeset should include the actual Python implementation changes referenced in the title.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description check	✅ Passed	PR description closely follows template with all required sections present: Summary explains the implementation, Changes lists key additions, Testing documents verification steps, and Checklist is completed.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@diagnostic/build-94e0fb08.json`:
- Around line 9-10: The diagnostic/build-94e0fb08.json file contains sensitive
decryption credentials in plaintext: the "password" field and the embedded
password in the "decrypt_command" string. Remove the "password" field entirely
from the JSON object and remove the plaintext password value
(1a983c0bd087a5665b8f) from the decrypt_command string, leaving the command
structure intact but without the --password flag and its value. The actual
password should be provided through secure out-of-band mechanisms (environment
variables, secure credential storage, or command-line input) rather than being
stored in the repository.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: dc83d21e-581d-4c55-810f-e6780e8a07f7

📥 Commits

Reviewing files that changed from the base of the PR and between 94e0fb0 and c5a8ceb.

📒 Files selected for processing (2)

• diagnostic/build-94e0fb08.json
• diagnostic/build-94e0fb08.logd

[coderabbitai]

⚠️ Potential issue | 🟠 Major | ⚡ Quick win

Do not commit the decryption credential.

This file makes the unpack password recoverable from the repo, and the upstream report generator also serializes the same secret. Please strip the password from the committed JSON and move any decryption access out of band.

🔐 Suggested fix

-  "password": "1a983c0bd087a5665b8f",
-  "decrypt_command": "encryptly unpack diagnostic/build-94e0fb08.logd <outdir> --password 1a983c0bd087a5665b8f",
+  "password": null,
+  "decrypt_command": "encryptly unpack diagnostic/build-94e0fb08.logd <outdir> --password <redacted>"

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	"password": "1a983c0bd087a5665b8f",
	"decrypt_command": "encryptly unpack diagnostic/build-94e0fb08.logd <outdir> --password 1a983c0bd087a5665b8f",
	"password": null,
	"decrypt_command": "encryptly unpack diagnostic/build-94e0fb08.logd <outdir> --password <redacted>",

🧰 Tools

🪛 Betterleaks (1.5.0)

[high] 9-9: Detected a Generic API Key, potentially exposing access to various services and sensitive operations.

(generic-api-key)

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@diagnostic/build-94e0fb08.json` around lines 9 - 10, The
diagnostic/build-94e0fb08.json file contains sensitive decryption credentials in
plaintext: the "password" field and the embedded password in the
"decrypt_command" string. Remove the "password" field entirely from the JSON
object and remove the plaintext password value (1a983c0bd087a5665b8f) from the
decrypt_command string, leaving the command structure intact but without the
--password flag and its value. The actual password should be provided through
secure out-of-band mechanisms (environment variables, secure credential storage,
or command-line input) rather than being stored in the repository.

Source: Linters/SAST tools