test(inspector): expand granular Node parity coverage

[TheHypnoo]

Summary

• expand the granular node:inspector callback parity suite from 3 to 37 entries
• cover public surface descriptors, session lifecycle, post() validation and callback behavior, deterministic Runtime/Schema/Debugger/Profiler/HeapProfiler commands, notifications, and isolated endpoint semantics
• document per-entry Node 26.5.0, Deno 2.9.2, Bun 1.3.14, and Perry evidence plus the separate node:inspector/promises follow-on boundary
• ratchet the measured inspector baseline from 2/3 to 4/37 without changing runtime or compiler behavior

Validation

• exact Node 26.5.0 oracle: three final complete runs, 111/111 zero-exit executions, identical aggregate SHA-256 fedccaf62d97bd5c1ebe1589a063e872222510b591536816ab38fe5bfb39fecd
• Perry release-focused runner: two identical runs at 4/37 with 33 stable output diffs and no compile failures or execution timeouts
• Deno 2.9.2: 30 exact passes, 4 diffs, 3 errors
• Bun 1.3.14: 14 diffs, 19 errors, 4 bounded timeouts; no exact passes
• cargo build --release -p perry -p perry-runtime-static -p perry-stdlib-static --locked --offline
• cargo fmt --all -- --check
• deno fmt --check test-parity/node-suite/inspector test-parity/node_suite_baseline.json
• JSON, evidence-row, baseline, scope, file-size, generated-artifact, and leaked-process checks

Exclusions

CPU/heap sampling, coverage payloads, snapshots, GC/finalization, breakpoints, active waitForDebugger, signals, stress, external frontends/clients, and scheduler-sensitive worker behavior remain excluded. node:inspector/promises remains the correct separate next suite.

Summary by CodeRabbit

• New Features

  • Added comprehensive node:inspector parity coverage across events, sessions, lifecycle behavior, protocol commands, runtime evaluation, network helpers, and API surface details.
  • Added validation for inspector callbacks, parameters, commands, object handling, and endpoint lifecycle scenarios.

• Documentation

  • Added coverage guidance, runtime comparison evidence, test constraints, and baseline results for the inspector parity suite.

[coderabbitai]

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: b72da657-f808-43a2-a9df-c4be3f444677

📥 Commits

Reviewing files that changed from the base of the PR and between 0422640 and cf98ebb.

📒 Files selected for processing (1)

• test-parity/node_suite_baseline.json

📝 Walkthrough

Walkthrough

The PR adds a deterministic node:inspector parity suite covering exports, sessions, lifecycle, events, protocol calls, runtime values, validation, and cleanup. It documents Node 26.5.0 oracle results and updates the node-suite baseline from 3 to 37 inspector entries.

Changes

Inspector parity suite

Layer / File(s)	Summary
Suite documentation and baseline test-parity/node-suite/inspector/README.md, test-parity/node-suite/inspector/EVIDENCE.md, test-parity/node_suite_baseline.json	Documents coverage, oracle evidence, exclusions, and follow-on inventory; updates aggregate and inspector baseline metrics.
Inspector surface introspection test-parity/node-suite/inspector/surface/*	Adds export, Session, domain helper, descriptor, and invalid-parameter probes.
Session and endpoint lifecycle test-parity/node-suite/inspector/lifecycle/*	Adds endpoint child-process checks, receiver validation, connection transitions, port validation, main-thread behavior, and concurrent sessions.
Notifications and helper events test-parity/node-suite/inspector/events/*, test-parity/node-suite/inspector/network/helpers.ts	Adds console, listener, notification-order, script-parsed, and Network event cleanup probes.
Session post validation and ordering test-parity/node-suite/inspector/post/*	Adds callback, method, parameter, circular-value, disconnected-session, overload, unknown-command, and pending-disconnect checks.
Protocol and runtime behavior test-parity/node-suite/inspector/protocol/*, test-parity/node-suite/inspector/runtime/*	Adds protocol enablement, schema, script-source, evaluation, exception, preview, subtype, and object-release probes.
Callback session cleanup test-parity/node-suite/inspector/session/callback-runtime.ts	Refines callback error reporting and ensures listener/session cleanup across connection and notification checks.

Estimated code review effort: 4 (Complex) | ~60 minutes

Possibly related PRs

• PerryTS/perry#5097: Introduces regression-guard tooling connected to the shared baseline metadata.
• PerryTS/perry#5166: Also updates node-suite baseline ratcheting metrics.
• PerryTS/perry#6367: Aligns CI Node version handling with the Node 26.5.0 inspector oracle.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description covers summary, validation, and exclusions, but it omits required template sections like Changes, Related issue, Test plan, and Checklist.	Add the missing template sections, especially a concrete Changes list, Related issue, Test plan, and checklist items.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately summarizes the main change: expanded Node inspector parity coverage.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch test/expand-node-inspector-parity

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