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fix(providers): never overlay a bare env key onto a renamed provider's explicit credentials - #850
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…s explicit credentials A bare OPENAI_API_KEY (or any <TYPE>_* env var) replaced the api_key and base_url of the single config.yaml provider of that type even when it had a different name and its own credentials, sending the env key to whatever base_url that provider pointed at. With two such providers the env vars were dropped silently. Bare env vars now fully override only the provider named after the type. A renamed provider of the type only receives fields it left empty; explicit fields are kept and the ignored env vars are logged as a warning naming the prefix and fields, never values. The ambiguous case logs the same warning. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QeodgpchoTafihJFab6u5k
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📝 WalkthroughWalkthroughBare provider environment variables now resolve against default-named, renamed, or multiple matching providers. Explicit fields remain unchanged where required, conflicts produce startup warnings, and tests and documentation cover the behavior. ChangesProvider environment overlay
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to Renamed providers with an embedded unresolved base URL placeholder will not receive the intended environment fallback, potentially leaving them unable to connect to their configured service. This bounded configuration correctness issue should be fixed before merge. Sequence Diagram(s)sequenceDiagram
participant Environment
participant applyProviderEnvVars
participant ProviderConfig
participant slog
Environment->>applyProviderEnvVars: provide bare provider variables
applyProviderEnvVars->>ProviderConfig: enumerate matching providers
ProviderConfig-->>applyProviderEnvVars: return candidates
applyProviderEnvVars->>ProviderConfig: fill unset fields or apply override
applyProviderEnvVars->>slog: log ignored or ambiguous variables
Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description explains the problem, the behavior change, affected provider cases, warnings, documentation updates, and test coverage. It provides the required change and rationale, although it does not use the template's exact "## Description" heading. Full details: Docstring CoverageExplanation Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 10 functions across 2 files. (3 skipped: 3 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Actionable comments posted: 1
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Inline comments:
In `@internal/providers/config_env.go`:
- Line 616: Update the base_url handling in the provider configuration merge to
use HasResolvedProviderValue(existing.BaseURL) instead of
normalizeResolvedBaseURL, so URLs containing embedded ${...} placeholders are
treated as unset and can be replaced by OPENAI_BASE_URL; add a regression test
covering an embedded placeholder such as https://${HOST}/v1.
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📒 Files selected for processing (5)
.env.templateconfig/config.example.yamldocs/advanced/configuration.mdxinternal/providers/config_env.gointernal/providers/config_env_test.go
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Confidence Score: 4/5Not safe to merge until unresolved model placeholders are excluded from the explicit-model check or removed before provider resolution. A focused Go test exercised YAML interpolation, the renamed-provider environment overlay, and final provider resolution, directly reproducing the fallback failure. Files Needing Attention: internal/providers/config_env.go needs to distinguish resolved model entries from unresolved placeholders; provider model resolution should also avoid retaining unresolved placeholder IDs.
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Reviews (1): Last reviewed commit: "fix(providers): never overlay a bare env..." | Re-trigger Greptile |
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| drop("session_sticky_keys", v.SessionStickyKeys != nil, existing.SessionStickyKeys != nil, func() { v.SessionStickyKeys = nil }) | ||
| drop("fairness_from_user_path", v.FairnessFromUserPath != nil, existing.FairnessFromUserPath != nil, func() { v.FairnessFromUserPath = nil }) | ||
| drop("models", len(v.Models) > 0, len(existing.Models) > 0, func() { v.Models = nil }) |
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A renamed OpenAI provider with models: ["${UNSET_MODELS}"] is considered explicitly configured because this only checks whether the slice is nonempty. If UNSET_MODELS is absent, the unresolved value suppresses the bare OPENAI_MODELS fallback and is retained in the resolved provider's routable model IDs. Only resolved model entries should block the fill-only overlay, and unresolved entries should not reach ProviderConfig.Models.
Artifacts
Focused Go test source for the renamed OpenAI unset-model placeholder scenario
- Captured source of the focused Go test that loads the YAML placeholder and runs provider resolution; it exercises the claimed configuration path and is the takeaway.
Passing execution output for renamed OpenAI unset-model placeholder scenario
- Captured output of the focused Go test showing `OPENAI_MODELS` ignored and `${UNSET_MODELS}` retained as the routable provider model; the bug reproduces.
…nset for the env fill Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QeodgpchoTafihJFab6u5k
2 participants
Found while testing the release candidate with a config-file provider of type
openaiunder a custom name.With one renamed provider of a type (for example
alpha: {type: openai, api_key: ..., base_url: http://localhost:9001/v1}) and a bareOPENAI_API_KEYin the environment, the env overlay replaced the provider's explicit key: the third-party base URL received the operator's real OpenAI key. With two renamed providers of the type, the env key was silently ignored with no log line.The by-type fallback exists (#215) so a renamed provider that leaves a field empty gets it from the bare env var, and that still works. Bare env vars now only fill fields the renamed provider left empty (an unresolved
${VAR}placeholder counts as empty); explicitly set fields win and a startup WARN names the env prefix, provider, and ignored field names, never values. With two or more renamed providers nothing is applied and the WARN lists them. A provider named after the type is still fully overridden, and a type with no config provider still registers one from the environment.Provider-specific note: the Vertex config-shape match goes through the same fill-or-warn path.
docs/advanced/configuration.mdx,config/config.example.yaml, and.env.templatenow state the rule and point at<PROVIDER>_<SUFFIX>_*for a second instance.Tests: a table-driven test covers explicit-field preservation, empty-field fill, placeholder fill, type-named override, and the two-provider warning, asserting the secret never appears in the log. The explicit-field and warning cases fail on
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Summary by CodeRabbit
Configuration
Documentation