Ring:using Assert

ring:using-assert

Moved from lib-commons

The canonical home for this package is now github.com/LerianStudio/lib-observability/assert. It lived in github.com/LerianStudio/lib-commons/v4/commons/assert and github.com/LerianStudio/lib-commons/v5/commons/assert through the v4 and v5 shim period; lib-commons v5 still re-exports every symbol via type aliases and thin wrappers for backward compatibility, but every type and function in lib-commons/v5/commons/assert is marked Deprecated: and delegates to lib-observability/assert. New code MUST import github.com/LerianStudio/lib-observability/assert. Existing imports continue to compile during the deprecation window — there are no behavior changes, only an import-path move.

When to use

Sweep mode:

• "Sweep the codebase for lib-observability/assert opportunities"
• "Audit this service for zero-panic policy compliance"
• "Find panic()/log.Fatal violations"
• "Replace DIY invariant checks with lib-observability/assert"

Reference mode:

• "What's the signature for assert.DebitsEqualCredits?"
• "How do I initialize assertion metrics?"
• "Should I panic, assert, or return an error here?"
• "How do I unwrap AssertionError in a Fiber error handler?"

Skip when

• Working on non-Go services
• Working on frontend code
• Target codebase is Ring itself

Related

Similar: ring:using-lib-observability, ring:using-runtime Compatibility: ring:using-lib-commons (covers the v5 deprecation shim and re-export aliases)

Mode Selection

SWEEP MODE

4-phase sweep. Each phase has a hard gate — do not proceed until the current phase produces its artifact.

Phase 1: Version Reconnaissance   → assert-version-report.json
Phase 2: CHANGELOG Delta Analysis → assert-delta-report.json
Phase 3: Multi-Angle DIY Sweep    → 6 × assert-sweep-{N}-{angle}.json
Phase 4: Consolidated Report      → assert-sweep-report.md + assert-sweep-tasks.json

Phase 1: Version Reconnaissance

1. Read go.mod — extract pinned versions of github.com/LerianStudio/lib-observability and (if present) github.com/LerianStudio/lib-commons/vN. Either import path is valid: lib-observability is canonical; lib-commons/v5/commons/assert is a deprecation shim that re-exports the same symbols.
2. WebFetch https://api.github.com/repos/LerianStudio/lib-observability/releases/latest — extract tag_name. Also fetch the lib-commons release tag for shim consumers.
3. Classify drift: up-to-date / minor-drift / moderate-drift / major-upgrade / module-mismatch. Treat "imports lib-commons assert shim" as module-mismatch for new code — the recommended migration is to switch the import to lib-observability/assert.
4. Emit /tmp/assert-version-report.json: {pinned_observability_version, pinned_commons_version, latest_observability_version, drift_classification, major_upgrade_required, module_path, uses_shim}

Phase 2: CHANGELOG Delta Analysis

1. WebFetch https://raw.githubusercontent.com/LerianStudio/lib-observability/main/CHANGELOG.md
2. Filter entries between pinned_observability_version and latest_observability_version that affect assert
3. Classify: new-predicate / new-method / breaking-change / security-fix / bugfix
4. Emit /tmp/assert-delta-report.json

Phase 3: Multi-Angle DIY Sweep

⛔ STOP-CHECK BEFORE DISPATCH

Before emitting any Task call, count the explorers you intend to launch in this turn.

• Count MUST equal 6.
• If count < 6 → STOP. Do not partial-dispatch. Reconcile against the 6 angles below and try again.
• The 6 angles are the canonical sweep. No substitutions, no omissions.

⛔ MUST NOT trickle-dispatch

All 6 explorers leave in the SAME TURN, before reading any explorer output.

Forbidden sequences:

• Dispatch explorer 1 → read result → dispatch explorer 2
• Dispatch a subset → wait → dispatch the rest
• Dispatch follow-up explorers conditioned on partial output
• Loop sequentially over the angle list

If you find yourself about to dispatch an explorer in a turn AFTER any explorer has already returned a result → STOP. You violated parallel dispatch. Report the violation and mark the phase INCOMPLETE rather than completing the trickle.

Self-verify after dispatch

After the dispatch turn, verify all 6 Task calls were emitted in that single turn. If fewer than 6 went out, the phase did NOT execute correctly. Mark INCOMPLETE and surface the dispatch failure — do NOT silently continue with a partial pool.

Parallel dispatch — atomic batch

Emit all 6 Task calls in a SINGLE TURN, as one atomic batch.

If your runtime exposes a multi_tool_use.parallel wrapper, use it to dispatch the complete pool in one wrapped invocation. This is the canonical fan-out mechanism on OpenAI-style tool envelopes and on certain Anthropic SDK consumers — naming it explicitly activates parallel emission on runtimes where trickle-dispatch is the default behavior.

If your runtime emits parallel tool_use blocks natively (Claude Code with Claude models), multi_tool_use.parallel may not be needed — but naming it is harmless and serves as an enforcement anchor.

The STOP-CHECK, anti-trickle, and self-verify guards above remain binding regardless of which mechanism your runtime uses.

Dispatch all 6 explorer angles in one parallel batch. Wait for all before Phase 4.

Per-explorer dispatch (subagent_type: ring:codebase-explorer):

## Target: <absolute path>
## Your Angle: <angle number + name>
## Severity Calibration / DIY Patterns / Replacement / Migration Complexity / Version Context
<verbatim from sub-files/sweep-angles.md for this angle>

## Output
Write to: /tmp/assert-sweep-{N}-{angle-slug}.json
Schema: { angle_number, angle_name, severity, migration_complexity,
  findings: [{file, line, diy_pattern, replacement, evidence_snippet, notes}],
  summary, requires_major_upgrade }
If no findings: write file with empty findings array.

Full angle specifications: sub-files/sweep-angles.md

The 6 angles cover:

1. panic() in non-test code (CRITICAL)
2. Defensive nil/empty checks without metric emission (HIGH)
3. Hand-rolled domain predicates duplicating assert.* (HIGH)
4. Missing InitAssertionMetrics at startup (HIGH)
5. Financial invariants in tests only, not production (CRITICAL)
6. AssertionError not unwrapped in error boundaries (MEDIUM)

Phase 4: Consolidated Report

Dispatch synthesizer to read all 6 explorer files and emit:

1. /tmp/assert-sweep-report.md — aggregate findings by severity
2. /tmp/assert-sweep-tasks.json — one task per DIY pattern cluster

Surface report path + task count; offer handoff to ring:running-dev-cycle.

REFERENCE MODE

Full API reference in sub-files/reference.md. Load sections relevant to your task.

Quick Navigation

Read sub-files/reference.md for full API detail.