feat(hooks): add json-error-recovery hook to prevent infinite retry loops

[BowTiedSwan]

Summary

This PR introduces a new hook json-error-recovery to address Issue #735.

Problem

When a tool call fails due to a JSON parse error (e.g., "Expected '}'"), the agent often retries the exact same malformed payload, leading to an infinite retry loop that wastes tokens and stalls the session.

Solution

The new json-error-recovery hook detects specific JSON error patterns in tool outputs:

• "JSON Parse error"
• "SyntaxError: Unexpected token"
• "Expected '}'"
• "Unexpected EOF"

When detected, it injects a high-priority system reminder into the tool output, instructing the agent to:

1. Stop and read the error.
2. Correct the JSON syntax.
3. Retry with valid JSON (instead of repeating the error).

Changes

• Added src/hooks/json-error-recovery/index.ts
• Updated src/hooks/index.ts and src/index.ts to register the new hook.
• Updated src/config/schema.ts to include the new hook name.
• Added verification tests in tests/json_recovery.test.ts.

Verification

• Ran new tests with bun test tests/json_recovery.test.ts -> PASSED.

---

Summary by cubic

Adds a json-error-recovery hook to stop infinite retry loops when tool calls fail with JSON parse errors by instructing the agent to fix and resend valid JSON. Fixes #735.

• Bug Fixes
  • Detects common JSON errors: "JSON Parse error", "SyntaxError: Unexpected token", "Expected '}'", "Unexpected EOF".
  • Appends a high-priority reminder at tool.execute.after to halt repeats and correct JSON.
  • Registers the hook in schema and index; adds tests for JSON recovery and edit recovery.

^{Written for commit b54a235. Summary will update on new commits.}

[github-actions]

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[BowTiedSwan]

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[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.