data.go

package mcp

import _ "embed"

// IndexJSON is the framework knowledge index, produced by cmd/indexer and
// embedded into the server binary at build time.
//
//go:embed data/index.json
var IndexJSON []byte
feat(mcp): initial implementation — MCP server, framework indexer, 10 tools, 8 validation rules (v0.1.0) Introduces code.nochebuena.dev/einherjar/mcp — the Einherjar Model Context Protocol server. A remote, streamable-HTTP service that teaches AI assistants about every other module of the framework: which package exposes which type, what each module guarantees through its compliance tests, the canonical wiring shape for a service, and whether a Go snippet follows the conventions. Indexes the framework on disk at build time and ships a self-contained binary via go:embed; imports nothing from other einherjar/* modules at compile time. server (cmd/server): - Streamable-HTTP MCP server built on github.com/modelcontextprotocol/go-sdk v1.0.0 - mcp.NewServer + mcp.NewStreamableHTTPHandler, served via net/http on EINHERJAR_MCP_ADDR (default :8080) and EINHERJAR_MCP_PATH (default /mcp) - /healthz liveness endpoint; structured JSON logging via log/slog - Loads the embedded data/index.json once at startup; in-memory for the process lifetime indexer (cmd/indexer): - Walks an Einherjar repository checkout (default ../), parses every sibling module's go.mod, README.md, CHANGELOG.md, docs/adr/ADR-.md, doc.go package comments, every exported type/interface/func/method/const/var (via go/doc on go/parser ASTs), and compliance_test.go - Captures module dependency edges by regex over each go.mod's require lines (einherjar/ paths only; self-reference filtered) - Appends a synthetic "wire" module documenting canonical application wiring conventions, authored at internal/index/builtins/README.md and embedded via go:embed; participates in list_modules / get_module / get_example like a real module internal/index: - Schema einherjar.mcp/index/v1; types: Index, Module, SubPackage, Symbol, ADR, Example, Compliance, InterfaceAssert, ComplianceTest - Build(repoRoot) → Index walks the repo; BuildBuiltins() returns the synthetic wire module from the embedded markdown - Load([]byte) → Index validates the schema version on read - FindModule, SearchSymbols helpers used by tools internal/tools (10 tools): - list_modules — enumerate every module with purpose + sub-packages - get_module — package doc, dependencies, sub-packages, key symbols, ADRs, compliance counts; optional embedded README - search_symbols — full-text across name, doc, sub-package, module; filterable by module and kind - get_symbol — full signature, doc comment, source file:line for one symbol - list_adrs — list ADRs across the framework or within one module - get_adr — fetch one ADR's markdown body - get_example — canonical usage snippets extracted from module READMEs and from the synthetic wire conventions - get_compliance — interface assertions (var _ Iface = impl) and structural test names from a module's compliance_test.go - get_changelog — full CHANGELOG.md markdown for one module - validate_snippet — pattern-match a Go snippet against framework conventions internal/rules (8 rules, registered via init() against a single registered slice): - launcher.missing-run — launcher constructed but Run() never called - launcher.no-components — launcher.New() called without any .Append(...) - launcher.run-error-discarded — lc.Run() invoked as an ExprStmt (return ignored) - logz.direct-env-read — os.Getenv("EINHERJAR_LOG_") bypassing logz config - web.server-not-appended — web/server constructed but not added to the launcher - wire.hook-bad-signature — with<Feature>(...) first param is not launcher.Launcher - wire.hook-outside-beforestart — repo/service/handler construction or route registration at the top level of a hook (outside lc.BeforeStart) - wire.route-specific-after-param — /users/{id} registered before a sibling /users/me of the same length and method (chi would shadow the literal route) Synthetic wire module (internal/index/builtins/README.md): - Project layout (cmd/<app>/main.go + internal/wire/.go + per-feature domain dirs) - Canonical Run() shape: config → logger → infra (db, cache, pool, mc, srv) → cross- cutting (validator, permission provider) → launcher.New → lc.Append(infra...) → withMigrations / withSuperAdminSeed / withHealth / withFeature hooks → return lc.Run() - Canonical with<Feature> hook shape: signature (launcher.Launcher first, server.Server second, deps last), single lc.BeforeStart closure containing all construction + route registration - chi route ordering, srv.With(authz(...)) authorization, middleware helpers (authz / skipPublicPaths / skipMethodPath), tokenSignerAdapter pattern showing that the framework exposes Signer.Sign as a primitive and the application owns the access/refresh response shape Packaging: - Multi-stage Dockerfile that builds from the einherjar repository root (docker build -f mcp/Dockerfile .) so cmd/indexer can walk every sibling module at image-build time; runtime layer is gcr.io/distroless/static-debian12:nonroot - 86-byte placeholder data/index.json committed once with `git add -f`; subsequent indexer runs overwrite it locally but the file is .gitignored - .gitea/CODEOWNERS and pull_request_template.md mirror the sibling layout Design notes: - mcp depends on nothing in einherjar/* — it reads the framework via the filesystem at index time. This keeps mcp outside the framework dependency graph and lets it index any version of einherjar without versioning itself in lock-step. - All structured-output tool responses initialise empty slices ([]Type{}) rather than relying on Go's nil-marshals-to-null default, so the SDK's JSON-schema output validator never rejects a tools/call result. 2026-05-29 18:12:45 +00:00			`package mcp`

			`import _ "embed"`

			`// IndexJSON is the framework knowledge index, produced by cmd/indexer and`
			`// embedded into the server binary at build time.`
			`//`
			`//go:embed data/index.json`
			`var IndexJSON []byte`