docs: updated migration guide for 2.0.0 with the cost split function - #6515
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WalkthroughThe v2.0.0 migration guides now identify the OSS base release, document five breaking changes, and explain nested request-cost data, updated Go access, and the Changesv2.0.0 migration guides
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The migration guide updates the documented cost API, but its checklist may direct callers to construct CostUpdate values in the wrong layer, which could cause incomplete or incorrect consumer migrations. The PR is otherwise mergeable with explicit owner awareness or a follow-up correction to that checklist item. Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Title checkExplanation The title identifies the migration-guide update and the cost restructuring. It is concise and directly related to the main documentation change, although it does not mention the Enterprise guide update. Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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In `@docs/migration-guides/v2.0.0.mdx`:
- Around line 373-375: Correct the migration checklist for custom LogStore
implementations: state that BulkUpdateCost accepts map[string]CostUpdate and
consumes each CostUpdate’s Total, Input, Output, and Additional fields, without
constructing values via CostUpdateFromBreakdown. Move the
CostUpdateFromBreakdown guidance to the caller that builds the update map,
preserving parity with the implementation and related documentation.
- Line 249: Update the reconciliation invariant in the migration guide to apply
only to newly emitted nested cost breakdowns, and explicitly note that consumers
must handle bare-number totals with only TotalCost populated before relying on
the equality. Keep the documented aggregate fields and historical compatibility
guidance consistent with BifrostCost.UnmarshalJSON behavior.
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…aximhq#6515) ## Summary Documents the fifth breaking change introduced in v2.0.0: the restructuring of the `BifrostCost` object from a flat list of token-category cost fields into a nested per-category breakdown (`input_cost`, `output_cost`, `additional_cost`) with optional details objects. Also updates the Enterprise v2.0.0 migration guide to reflect that the OSS base is the final v2.0.0 release (not `2.0.0-prerelease3`) and adds the three previously undocumented OSS breaking changes (governance API namespace move, `HTTPTransportPreHook` phase change, and cost restructure) to the Enterprise inherited-changes table. ## Changes - Updated the Enterprise migration guide introduction to reference the OSS v2.0.0 base instead of `2.0.0-prerelease3`, and expanded the inherited breaking changes table to include OSS changes 3, 4, and 5 with migration actions. - Updated the OSS v2.0.0 migration guide introduction to mention the cost restructure as the fifth breaking change. - Added a full "Breaking Change 5" section to the OSS migration guide covering: - A JSON field mapping table from the flat v1.x shape to the nested 2.0.0 shape. - Before/after JSON examples. - Before/after Go struct access examples for `schemas.BifrostCost`. - `LogStore.BulkUpdateCost` signature change from `map[string]float64` to `map[string]CostUpdate`, with guidance on using `CostUpdateFromBreakdown`. - A note that legacy flat-shape deserialization still works for historical data. - Added two new migration checklist steps for updating cost object consumers and custom log store implementations. ## Type of change - [ ] Bug fix - [ ] Feature - [ ] Refactor - [x] Documentation - [ ] Chore/CI ## Affected areas - [ ] Core (Go) - [ ] Transports (HTTP) - [ ] Providers/Integrations - [ ] Plugins - [ ] UI (React) - [x] Docs ## How to test Review the rendered documentation pages for: - `docs/migration-guides/v2.0.0.mdx` — confirm Breaking Change 5 section renders correctly, the JSON field mapping table is complete, and the two new checklist steps appear. - `docs/enterprise/migration-guides/v2.0.0.mdx` — confirm the introduction no longer references `2.0.0-prerelease3`, and that rows 3, 4, and 5 appear in the inherited breaking changes table with correct migration actions. ## Screenshots/Recordings N/A — documentation-only change. ## Breaking changes - [ ] Yes - [x] No ## Related issues N/A ## Security considerations None. This is a documentation update only. ## Checklist - [x] I read `docs/contributing/README.md` and followed the guidelines - [ ] I added/updated tests where appropriate - [x] I updated documentation where needed - [x] I verified builds succeed (Go and UI) - [ ] I verified the CI pipeline passes locally if applicable
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Summary
Documents the fifth breaking change introduced in v2.0.0: the restructuring of the
BifrostCostobject from a flat list of token-category cost fields into a nested per-category breakdown (input_cost,output_cost,additional_cost) with optional details objects. Also updates the Enterprise v2.0.0 migration guide to reflect that the OSS base is the final v2.0.0 release (not2.0.0-prerelease3) and adds the three previously undocumented OSS breaking changes (governance API namespace move,HTTPTransportPreHookphase change, and cost restructure) to the Enterprise inherited-changes table.Changes
2.0.0-prerelease3, and expanded the inherited breaking changes table to include OSS changes 3, 4, and 5 with migration actions.schemas.BifrostCost.LogStore.BulkUpdateCostsignature change frommap[string]float64tomap[string]CostUpdate, with guidance on usingCostUpdateFromBreakdown.Type of change
Affected areas
How to test
Review the rendered documentation pages for:
docs/migration-guides/v2.0.0.mdx— confirm Breaking Change 5 section renders correctly, the JSON field mapping table is complete, and the two new checklist steps appear.docs/enterprise/migration-guides/v2.0.0.mdx— confirm the introduction no longer references2.0.0-prerelease3, and that rows 3, 4, and 5 appear in the inherited breaking changes table with correct migration actions.Screenshots/Recordings
N/A — documentation-only change.
Breaking changes
Related issues
N/A
Security considerations
None. This is a documentation update only.
Checklist
docs/contributing/README.mdand followed the guidelines