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fix: close the spec v0.9.0 gaps the compliance audit found - #361
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Merge Risk: 🟡 Moderate · up to
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| Check name | Status | Explanation | Resolution |
|---|---|---|---|
| Docstring Coverage |  |
Docstring coverage is 42.86% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 21 functions across 17 files. (4 skipped:… | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Title check The title names a fix for compliance-audit gaps but does not name the main change. The changeset covers READY-state handling for providers without init, NotImplementedError handling, track return valu… Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request. Description check The pull request description is specific and relates directly to the changeset. It states the audit scope (spec v0.9.0, sections 1-6 and Appendix A) and lists the MUST fixes: provider without init bec… Full details: Title check
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Explanation
The title names a fix for compliance-audit gaps but does not name the main change. The changeset covers READY-state handling for providers without init, NotImplementedError handling, track return value, frozen evaluation context for hooks, and flag metadata freezing. The title says 'spec v0.9.0 gaps' and 'compliance audit', which points to the purpose but not to any specific behavior. It is related to the changeset, so it is not off-topic, but it is too broad to show the primary change.
Full details: Description check
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Explanation
The pull request description is specific and relates directly to the changeset. It states the audit scope (spec v0.9.0, sections 1-6 and Appendix A) and lists the MUST fixes: provider without init becomes READY at registration (2.8.5.1), NotImplementedError handled like other errors in hooks, handlers and provider init/shutdown, track returning nil (6.1.1.1), deep-frozen evaluation context copies for after/error/finally hooks (4.1.4.1), and frozen flag metadata (1.4.15.1). It also describes the new FrozenCopy.of helper, which replaces Hooks.frozen_copy, and its value-type limits. Those points match the raw summary, including the removed Hooks.frozen_copy, the new RECOVERABLE_ERRORS constant, and the track spec. It also documents benchmark costs, rollback behavior, and known limits.
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Full details: Docstring Coverage
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Explanation
Docstring coverage is 42.86% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 21 functions across 17 files. (4 skipped: 4 unsupported.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #361 +/- ##
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+ Coverage 99.79% 100.00% +0.20%
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Files 34 34
Lines 966 988 +22
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+ Hits 964 988 +24
+ Misses 2 0 -2 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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🟡 Changes recommended
Reentrant READY callbacks can shut down an active provider, and copied hash defaults still expose mutable caller-owned values.
2 open issues
What changed in this PR
Addresses spec v0.9.0 compliance gaps in the Ruby SDK’s provider lifecycle, error handling, tracking, and immutable hook inputs.
Changes:
- Marks providers without
initREADY at registration and moves READY callbacks before replacement shutdown. - Handles
NotImplementedErrorconsistently and makestrackreturnnil. - Introduces shared deep-copy logic for hook inputs and flag metadata, with regression tests and updated signatures.
| File | Description |
|---|---|
| spec/specification/tracking_spec.rb | Tests that tracking returns nil. |
| spec/specification/provider_spec.rb | Tests initialization errors and immediate readiness. |
| spec/specification/hooks_spec.rb | Tests nested immutability and hook error isolation. |
| spec/specification/flag_evaluation_api_spec.rb | Tests metadata freezing and shutdown error isolation. |
| spec/specification/events_spec.rb | Tests handler error isolation. |
| spec/open_feature/sdk/hooks/hook_context_spec.rb | Updates mixed-value freezing expectations. |
| spec/open_feature/sdk/hooks/hints_spec.rb | Tests nested hint freezing with uncopyable values. |
| spec/open_feature/sdk/frozen_copy_spec.rb | Tests shared copying behavior and cycles. |
| sig/open_feature/sdk/hooks/hook_context.rbs | Updates lazy context access signatures. |
| sig/open_feature/sdk/hooks/frozen_copy.rbs | Removes the old helper signature. |
| sig/open_feature/sdk/frozen_copy.rbs | Declares the shared copy helper. |
| sig/open_feature/sdk/evaluation_error.rbs | Declares recoverable error types. |
| README.md | Documents deep freezing and object passthrough. |
| lib/open_feature/sdk/provider/resolution_details.rb | Deep-freezes flag metadata values. |
| lib/open_feature/sdk/hooks/hook_executor.rb | Uses consistent recoverable error handling. |
| lib/open_feature/sdk/hooks/hook_context.rb | Lazily copies context and freezes provider metadata. |
| lib/open_feature/sdk/hooks/hints.rb | Uses the shared copy helper. |
| lib/open_feature/sdk/hooks/frozen_copy.rb | Removes the hook-specific helper. |
| lib/open_feature/sdk/frozen_copy.rb | Adds shared, cycle-aware frozen copying. |
| lib/open_feature/sdk/event_dispatcher.rb | Isolates recoverable handler failures. |
| lib/open_feature/sdk/evaluation_error.rb | Defines shared recoverable error classes. |
| lib/open_feature/sdk/configuration.rb | Updates readiness timing and lifecycle error handling. |
| lib/open_feature/sdk/client.rb | Returns nil from tracking and shares error handling. |
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Actionable comments posted: 1
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Inline comments:
Review comments at @lib/open_feature/sdk/configuration.rb:
- Around line 202-204: Update the shutdown path guarded by needs_shutdown to
recheck under @provider_mutex, after READY delivery, whether old_provider is
still bound before calling its shutdown method; skip shutdown if the READY
handler registered it again.
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📒 Files selected for processing: 23
README.mdlib/open_feature/sdk/client.rblib/open_feature/sdk/configuration.rblib/open_feature/sdk/evaluation_error.rblib/open_feature/sdk/event_dispatcher.rblib/open_feature/sdk/frozen_copy.rblib/open_feature/sdk/hooks/frozen_copy.rblib/open_feature/sdk/hooks/hints.rblib/open_feature/sdk/hooks/hook_context.rblib/open_feature/sdk/hooks/hook_executor.rblib/open_feature/sdk/provider/resolution_details.rbsig/open_feature/sdk/evaluation_error.rbssig/open_feature/sdk/frozen_copy.rbssig/open_feature/sdk/hooks/frozen_copy.rbssig/open_feature/sdk/hooks/hook_context.rbsspec/open_feature/sdk/frozen_copy_spec.rbspec/open_feature/sdk/hooks/hints_spec.rbspec/open_feature/sdk/hooks/hook_context_spec.rbspec/specification/events_spec.rbspec/specification/flag_evaluation_api_spec.rbspec/specification/hooks_spec.rbspec/specification/provider_spec.rbspec/specification/tracking_spec.rb
💤 Files with no reviewable changes: 2
- lib/open_feature/sdk/hooks/frozen_copy.rb
- sig/open_feature/sdk/hooks/frozen_copy.rbs
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- A provider without init is READY from registration, and its READY handlers run before the old provider's shutdown, so a handler added during that shutdown runs once (2.8.5.1). - NotImplementedError from error and finally hooks, event handlers, provider init and shutdown is handled like other errors, as the client already does (1.6.1, 1.6.2, 4.3.8, 4.4.3, 4.4.4, 5.2.5). One RECOVERABLE_ERRORS list defines what the SDK recovers from. - track returns nothing (6.1.1.1). - After the before stage, hooks read a deep-frozen copy of the evaluation context, made on first read, so they can't change the caller's nested values (4.1.4.1). - Flag metadata values are frozen too (1.4.15.1). - FrozenCopy is shared by hook inputs and flag metadata. It copies only the spec's value types (strings, times, hashes, arrays); other objects such as user records are passed through, as before. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: Jose Colella <jose.colella@gusto.com>
From review of the audit fixes: - A Time in a hook input is copied but left unfrozen, so a hook calling utc or localtime no longer turns the evaluation into its default. - A Hash's default proc isn't copied, so reading a missing key of a frozen copy doesn't raise. - The old provider is shut down only if it's still unbound after the new provider's READY handlers, so a handler that rolls back to it doesn't leave a shut-down provider bound. - Context fields share one copy map, so a structure two fields share is copied once. - FrozenCopy works where Ractor isn't defined. - Threaded specs wait with timeouts instead of blocking. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: Jose Colella <jose.colella@gusto.com>
Clearing the default proc also cleared a plain default, so a copied Hash.new(value) lost its default. Now only a default proc is dropped, and a plain default is copied and frozen like the values. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: Jose Colella <jose.colella@gusto.com>
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Part of #300 (spec v0.9.0). A compliance audit of
main(9e166fe) went through every requirement in sections 1–6 and Appendix A. This PR fixes the MUSTs it found behaving wrongly. Untested requirements whose behavior is already correct get tests in a separate test-only PR.Fixes
initis READY from registration (2.8.5.1). Its READY handlers now run before the old provider shuts down. Before, the provider stayed NOT_READY untilset_providerreturned, so every evaluation returned the default withPROVIDER_NOT_READYwhile the old provider was still shutting down.NotImplementedErroris handled like any other error (4.3.8, 4.4.3, 4.4.4, 5.2.5, 1.6.1, 1.6.2). The client already treated it that way, since it's Ruby's abstract-method idiom. When raised by an error or finally hook, an event handler, or a provider'sinitorshutdown, it used to stop the remaining hooks, handlers or shutdowns. In one case it also ran an error hook twice.Interruptand other non-StandardErrorexceptions are still not rescued.trackreturns nothing (6.1.1.1). It used to return whatever the provider'strackreturned.details.flag_metadata["k"] << "x"changed the provider's string.Worth a look
OpenFeature::SDK::FrozenCopy.ofreplacesHooks.frozen_copy, and hook inputs and flag metadata now share it.ProviderMetadatais a Struct, soHookContextcopies its members itself.utcorlocaltimekeeps working and still can't touch the caller's object.Cost: one API hook, Ruby 4.0, against main.
Evaluations without hooks are unchanged.
Rollbacks: the old provider is shut down only if it's still unbound once the new provider's READY handlers have run. So a handler that rolls back to the old provider doesn't leave a shut-down provider bound.
Known limits, left alone:
ProviderMetadatais passed through. All contrib providers use those shapes.Remaining race: a READY handler registered between the status update and the dispatch snapshot can still run twice. Providers with
inithave the same race on main.Not changed, by earlier decisions
ArgumentError(1.4.10). It's Ruby's equivalent of a compile-time type error.provider_metadatastill returns nil aftershutdown(1.1.5), since no provider is configured then.set_provider_and_waitreturns READY from inside a handler (1.1.2.4). Each event's status is still recorded before its own handlers run.🤖 Generated with Claude Code