feat(#910): federated config merge in config-loader (ADR-857 phase 3b) (#914)

Build the federated config merge: each capability owns its config-key slice
(ADR-857 decision 3 / ADR-894), and loadConfig merges them defensively. The
registry now emits a full configSchema index ({key:{owner,type,default,
description}}, generator-validated); a new src/federated-config.cts resolves
federated keys defensively (skip central keys -> pending-migration warning,
skip malformed slices -> warning never throw, else type-checked user override
?? default, with nested dotted-path lookup and enum validation); and loadConfig
applies the overlay on every return path.

Wired as a provably-empty no-op channel: every UI-pilot key is still central,
so validKeys is empty and loadConfig returns byte-identical output on all paths
(identity return when the overlay is empty; shared CONFIG_DEFAULTS never
mutated). Registry-only; no key is cut over; nothing in the live loop changes.

Closes #910

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Tom Boucher
2026-06-08 23:37:41 -04:00
committed by GitHub
parent 5bf77a527f
commit 6dbd895028
13 changed files with 1981 additions and 9 deletions

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@@ -342,7 +342,8 @@ Node.js CLI utility (`gsd-tools.cjs`) with domain modules split across `gsd-core
| Module | Responsibility |
| ---------------------- | --------------------------------------------------------------------------------------------------- |
| `config-loader.cjs` | Project config loading — defaults merge, legacy-key migration, workstream overlay, unknown-key/profile-override validation (extracted from `core.cjs`, ADR-857) |
| `config-loader.cjs` | Project config loading — defaults merge, legacy-key migration, workstream overlay, unknown-key/profile-override validation, and federated config overlay (ADR-857 phase 3b) (extracted from `core.cjs`, ADR-857) |
| `federated-config.cjs` | Defensive merge of capability-declared config slices (ADR-857 phase 3b); exports `mergeFederatedConfig`; no-op until capability keys are removed from the central config-schema at cutover |
| `core-utils.cjs` | Shared low-level utility primitives — POSIX path normalization, sub-repo/subdirectory scanning, phase file stats, slug/one-liner/plan-id helpers, time-ago (extracted from `core.cjs`, ADR-857) |
| `core.cjs` | Shared utilities; compatibility re-exports for planning, I/O (`io.cjs`), and phase-id helpers |
| `io.cjs` | CLI I/O primitives — output/error emission, JSON-error mode, large-payload temp-file spillover |

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@@ -293,6 +293,7 @@
"docs.cjs",
"drift.cjs",
"fallow-runner.cjs",
"federated-config.cjs",
"frontmatter.cjs",
"gap-checker.cjs",
"graphify.cjs",

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@@ -370,7 +370,7 @@ The `gsd-planner` agent is decomposed into a core agent plus reference modules t
---
## CLI Modules (99 shipped)
## CLI Modules (100 shipped)
Full listing: `gsd-core/bin/lib/*.cjs`.
@@ -404,6 +404,7 @@ Full listing: `gsd-core/bin/lib/*.cjs`.
| `docs.cjs` | Docs-update workflow init, Markdown scanning, monorepo detection |
| `drift.cjs` | Post-execute codebase structural drift detector (#2003): classifies file changes into new-dir/barrel/migration/route categories and round-trips `last_mapped_commit` frontmatter |
| `fallow-runner.cjs` | Fallow audit adapter for `/gsd-code-review`: binary resolution (`PATH` then `node_modules/.bin`), actionable missing-binary errors, and structural findings normalization |
| `federated-config.cjs` | Defensive merge of capability-declared config slices into the loadConfig return value — ADR-857 phase 3b; exports `mergeFederatedConfig({ configSchema, isCentralKey, userConfig })` → `{ values, validKeys, warnings }`; no-op until a key is atomically removed from the central config-schema (the cutover step) |
| `frontmatter.cjs` | YAML frontmatter CRUD operations |
| `gap-checker.cjs` | Post-planning gap analysis (#2493): unified REQUIREMENTS.md + CONTEXT.md decisions vs PLAN.md coverage report (`gsd-tools gap-analysis`) |
| `graphify.cjs` | Knowledge-graph build/query/status/diff for `/gsd-graphify` |