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* Initial plan
* plan: Python scope-based resolution migration
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* feat(python): scope-based resolution provider hooks + 62 tests
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* refactor(python): split scope-hooks monolith into focused modules
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* test(python): integration-style scope-resolution tests + suffixResolve fallback
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* wire python scope-based resolution end-to-end (initial pass)
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* keep legacy IMPORTS for python (heritage needs importMap), scope phase owns CALLS only
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* test(python): remove parallel scope-resolution integration test
The new test/integration/python-scope-resolution.test.ts duplicated coverage
the reviewer explicitly rejected. The existing
test/integration/resolvers/python.test.ts (191 tests, driven by
runPipelineFromRepo) is the source of truth for Ring 3 parity.
Also document the IMPORTS-emission follow-up gap: wiring emitImportEdges
in python-scope-emit.ts today regresses 10 IMPORTS-edge fixtures because
the scope-extractor's ImportEdge coverage is narrower than legacy
pythonImportConfig.importResolver. Tracked as a follow-up.
Baseline with REGISTRY_PRIMARY_PYTHON=1 is unchanged: 109/191 pass.
* feat(ingestion): scope-resolution phase owns Python IMPORTS edges (RFC #909 Ring 3)
When `REGISTRY_PRIMARY_PYTHON=1`, IMPORTS graph edges for Python files are now
emitted exclusively by the new scope-resolution path. The legacy
`import-processor` still runs — heritage resolution needs its importMap /
namedImportMap / moduleAliasMap population — but its graph edge emission is
gated per-language so Python no longer double-emits.
This closes the reviewer's second change request on PR #980: "the legacy path
must be turned off". Legacy IMPORTS edges for Python are now off by default
when the flag is enabled.
Three bugs were fixed to make the new path's coverage match legacy:
1. **Root-file bailout** (import-resolvers/python.ts): `resolvePythonImportInternal`
returned null immediately when the importer file lived at the repo root
(importerDir === ''). The ancestor directory walk further down already
handles this case correctly; the early return was the bug. Proximity check
now only runs when importerDir is non-empty, and the ancestor walk sees
root-level files for the first time.
2. **External dotted imports** (languages/python/import-target.ts): the new
path fell straight through to `suffixResolve` for multi-segment imports,
which happily matched `django.apps` to a local `accounts/apps.py`. Mirror
`pythonImportStrategy`'s `hasRepoCandidate` guard — suffix-match only when
the leading segment exists somewhere in-repo as a package, __init__.py,
or namespace directory.
3. **suffixResolve ambiguity** (languages/python/import-target.ts): the
shared `suffixResolve` helper requires a pre-built `SuffixIndex` to
disambiguate ties. Without one it falls back to an O(files) scan that
silently picks the first match when the last segment collides across
directories (e.g. `accounts.models` matching `billing/models.py`).
Replaced with `resolveAbsoluteFromFiles` — exact lookup first, then a
deterministic suffix match.
Validation:
- Flag OFF: 191/191 pass (no regression).
- Flag ON: 109/191 pass (82 fail — exact baseline match; remaining 82 are
unchanged CALLS-edge provider-feature gaps tracked as Phase B follow-ups).
- `tsc --noEmit`: clean.
The 82 CALLS failures cluster into 44 describe blocks covering type-inference
features (assignment chains, walrus, class-level annotations, constructor
inference, C3 MRO, overload dispatch, return-type inference) that need
dedicated Ring 3 follow-up work. Each cluster is tracked against the RFC #909
shadow-parity gate (>=99% fixtures / >=98% corpus) in the per-language ticket.
* ci(scope-resolution): automatic parity gate driven by MIGRATED_LANGUAGES
Adds the Ring 3 parity gate the RFC §6.4 requires: when a language's
scope-resolution migration is marked complete, CI runs its resolver
integration test twice on every PR (once with the legacy DAG, once with
the registry-primary path) and both must pass.
The "is this language migrated" signal is a single TypeScript constant:
// gitnexus/src/core/ingestion/registry-primary-flag.ts
export const MIGRATED_LANGUAGES: ReadonlySet<SupportedLanguages> =
new Set([ /* SupportedLanguages.Python when ready */ ]);
Adding a language here has three simultaneous effects:
1. `isRegistryPrimary(lang)` defaults to true for that language in
production (env-var override still wins if set explicitly).
2. `.github/workflows/ci-scope-parity.yml` auto-discovers the set via
`npx tsx scripts/ci-list-migrated-languages.ts`, builds a parity
matrix, and runs:
- `REGISTRY_PRIMARY_<LANG>=0 npx vitest run resolvers/<slug>.test.ts`
- `REGISTRY_PRIMARY_<LANG>=1 npx vitest run resolvers/<slug>.test.ts`
Both legs must pass for the job to succeed.
3. Legacy-path gating in call-processor.ts / import-processor.ts kicks
in automatically through the same `isRegistryPrimary` lookup.
No JSON registry, no manual workflow edit, no second source of truth —
contributors update the Set and CI picks it up. Empty Set = parity job
is a skipped matrix (workflow still reports success).
The new `scope-parity` reusable workflow is added to ci.yml's `needs`
graph and ci-status gate. Its result must be `success` (skipped would
mean upstream discover job failed and should block).
Validation (with empty MIGRATED_LANGUAGES set):
- flag OFF: 191/191 pass (no behavior change)
- flag ON (manual REGISTRY_PRIMARY_PYTHON=1): 82 fails = baseline exact match
- `npx tsc --noEmit`: clean
- concurrency-convention script: pass
- tsx discovery script: emits `[]` correctly
* ci(scope-resolution): keep MIGRATED_LANGUAGES empty; fix linter auto-uncomment
Previous commit's example entry got auto-uncommented (linter preferred a
type-checkable `SupportedLanguages.Python` over a commented-out reference).
That would have triggered the parity CI gate against Python, which today
has 82 known flag-on failures — unintended and would block the PR.
Use the explicit generic `new Set<SupportedLanguages>([])` so an empty set
still type-checks without needing an uncommented-out sample member.
Example in the comment now has `// SupportedLanguages.Python,` so it
remains illustrative without participating in the set.
* feat(python): capture constructor-inferred + annotated type bindings
Extends the Python scope-extractor with two new type-binding capture
patterns so receiver-typed method dispatch has concrete type bindings
to work from:
1. `u: User = ...` / `u: User` — variable annotations. `@type-binding.annotation`
anchor, `source: 'annotation'`.
2. `u = User("alice")` — assignment RHS is a bare-identifier call (Python
has no `new` keyword; constructor-shaped calls are syntactically
identical to function calls). `@type-binding.constructor` anchor,
`source: 'constructor-inferred'`.
The runtime query lives in `query.ts` (the `.scm` file is documentation
per the comment at its top); both are updated.
Fixes 19 failures across these resolver fixtures (flag-on 82 → 63):
- Python constructor-inferred type resolution (3)
- Python class-level annotation resolution (3)
- Python nullable receiver resolution (3)
- Python member-call / receiver-constrained / constructor-call (3)
- Python assignment chain propagation (2)
- Python walrus / match-case / chained method (3)
- Python member access iterable for-loop (2)
* feat(python): strip nullable unions + prefer annotations over inference
Two linked changes that together fix the 4 nullable-receiver tests:
1. `stripNullable` in Python's `interpretTypeBinding` unwraps `User | None`,
`None | User`, and `Optional[User]` to `User`, so receiver-typed
resolution treats nullable receivers identically to non-nullable ones.
Three-arm unions (`User | Error | None`) are left unchanged — truly
ambiguous for single-receiver inference.
2. Source-strength ordering in `pass4CollectTypeBindings`. When multiple
matches fire for the same bound name in the same scope — e.g. the
`u: User = find()` idiom where both the annotation and
constructor-inferred patterns match — the explicit annotation now
wins regardless of query-match arrival order. Rank:
explicit (annotation / parameter-annotation / return-annotation / self) > inferred
Also reorders the two Python patterns in query.ts / scopes.scm so the
constructor-inferred pattern appears first — a belt-and-braces fallback
that keeps behavior deterministic if the shared priority ranking is ever
revisited.
Fixes 4 failures (flag-on 63 → 59):
- Python nullable receiver resolution (4 tests)
Flag-off regression check: 191/191 still pass.
* feat(python): walrus, qualified-call, match-case type bindings
Extends the constructor-inferred family of captures with three more
assignment-shaped patterns that all bind a variable to a class-like type:
- Walrus: `(u := User(...))` → `u: User` via `(named_expression)`.
- Qualified call RHS: `u = models.User(...)` → `u: models.User` via
`(attribute)` node .text. Falls through resolveTypeRef Phase 2
(QualifiedNameIndex dotted fallback).
- Match as-pattern: `case User() as u:` → `u: User` via `(as_pattern)`
+ `(class_pattern (dotted_name))`.
Fixes 2 failures (flag-on 59 → 57):
- Python walrus operator type inference
- Python match/case as-pattern type binding
Qualified-call constructor tests still fail because they require
cross-module qualifiedName registration (models.User → models.py's User
class) which isn't yet wired in the Python extractor. Tracked as
follow-up alongside module-import CALLS (#337) resolution.
* feat(python): chain type bindings + strip list[T] generic for for-loop
Adds two capture patterns and a shared transitive-closure pass that
together handle Python's variable-aliasing and for-loop-over-typed-
iterable patterns:
1. `(assignment left: (identifier) right: (identifier))` — `alias = u`.
2. `(for_statement left: (identifier) right: (identifier))` — `for u in users`.
Both emit `@type-binding.alias` with the RHS identifier as rawName. The
shared `pass4CollectTypeBindings` now runs a final transitive-closure
walk that follows identifier-chain TypeRefs through the declaring scope
and its ancestors (depth-capped, cycle-guarded) so `alias` ultimately
points at the class type instead of another local variable name.
Generic stripping in `interpret.ts` unwraps single-arg collection
wrappers — `list[User]`, `set[User]`, `Iterable[User]`, etc. — to the
element type. Multi-arg generics (`dict[str, User]`, `Callable[...]`)
are left alone; their semantics aren't unambiguous.
Fixes 8 failures (flag-on 57 → 49):
- Python assignment chain propagation (4)
- Python nullable + assignment chain (2)
- Python walrus operator (:=) assignment chain (2)
Flag-off still 191/191.
* feat(python): namespace & class receiver resolution + file-level caller fallback
Adds a Python-specific post-resolution pass `emitReceiverBoundCalls`
that closes two receiver gaps the shared `MethodRegistry.lookup` doesn't
cover:
1. **Namespace receivers** — `import models; models.User()` /
`import models as m; m.User()`. The shared `lookupReceiverType` only
walks `scope.typeBindings`; namespace imports never land there
(they're filtered out of `scope.bindings` when the target module
has no self-named def, per `finalize-algorithm.ts:540`). The new
pass walks `indexes.imports` directly, builds a per-file
`localName → targetFilePath` map, and emits CALLS/ACCESSES edges
against the target file's `localDefs`.
2. **Class-name receivers** — `Dog.classify("dog")`. The shared resolver
requires typeBindings; class bindings in `scope.bindings` are never
consulted as receivers. The new pass checks class-kind bindings in
the call scope's chain and resolves members via `ownerId`.
Also fixes module-level call attribution: `resolveCallerGraphId` now
falls back to the File node id (`generateId('File', filePath)`) when no
enclosing function/method/class is found. Matches legacy DAG behavior
for module-scope calls like `u = models.User()` at the top of app.py.
Fixes 4 failures (flag-on 49 → 45):
- Python module import CALLS resolution (Issue #337) (4 of 7)
Flag-off still 191/191.
* feat(python): dotted-typebinding receiver resolution
Adds case 3 to `emitReceiverBoundCalls`: when a receiver's typeBinding
has a dotted rawName like `u: models.User` (the constructor-inferred
form fired by `u = models.User(...)`), walk the namespace map + target
file's defs to find the class, then look up the member via ownerId.
`resolveTypeRef`'s QualifiedNameIndex fallback can't cover this because
the target class's qualifiedName in models.py is just `"User"`, not
`"models.User"` — the dotted form only exists in the call-site file's
receiver expression. This pass bridges that gap without modifying the
shared registry.
Fixes 9 more failures (flag-on 45 → 36):
- Python qualified constructor inference (2)
- Python module import CALLS resolution (Issue #337) (3)
- (cluster overlap — several downstream tests in assignment/nullable/
walrus that propagate through qualified-ctor bindings also benefit)
Flag-off still 191/191.
* feat(python): consult finalized bindings for receiver resolution
`findClassBindingInScope` now walks BOTH:
1. `scope.bindings` — pre-finalize local declarations (origin: 'local')
2. `indexes.bindings` — post-finalize cross-file imports/namespaces
Without (2) we were blind to any class brought in via
`from models import Dog` at the call site's file, because the
scope-extractor's Pass 2 only populates local bindings and the
cross-file finalize produces a separate bindings map that never lands
on `scope.bindings`.
Case 2 (`Dog.classify()`) now walks MRO so inherited static/class
methods resolve — `Dog.classify()` where `classify` lives on `Animal`.
Case 4 (simple typeBinding like `u: U` from aliased import) now uses
`findClassBindingInScope` instead of the shared `resolveTypeRef`,
because `resolveTypeRef`'s `ctx.scopes` only sees pre-finalize local
bindings too.
Fixes 4 more failures (flag-on 36 → 32):
- Python method enrichment > Dog.classify static (1)
- Python static/classmethod class-as-receiver (2)
- Python alias import resolution (1)
Flag-off still 191/191.
* refactor(python-scope): extract language-agnostic emit-core/
Unit 1 of the python migration architectural plan
(docs/plans/2026-04-19-001-refactor-python-migration-architectural-plan.md).
Splits python-scope-emit.ts (~945 → 481 lines) by lifting 14 generic
graph-feeding primitives into emit-core/:
- graph-node-lookup, graph-id, emit-edge
- emit-references, emit-imports
- scope-walkers (findReceiverTypeBinding, findClassBindingInScope,
findOwnedMember, findExportedDef)
- namespace-targets, method-dispatch-bridge
Each file carries a "Next-consumer contract" JSDoc so future language
migrations (TS #927, JS #928, Java, Kotlin, Ruby) import from emit-core
rather than re-implementing. python-scope-emit.ts keeps only the four
Python-specific pieces: runPythonScopeResolution (orchestrator),
buildPythonMro, emitReceiverBoundCalls (4 cases), populateMethodOwnerIds
— these move to languages/python/emit/ in Unit 11.
Pure refactor, zero behavior change:
- flag-off: 191/191 python.test.ts pass (identical baseline).
- flag-on (REGISTRY_PRIMARY_PYTHON=1): 32 fail / 159 pass (identical
baseline — the refactor neither fixes nor regresses any test).
- tsc --noEmit clean.
* feat(python-scope): arity metadata + bind function decls in parent scope
Unit 2 of the python migration architectural plan
(docs/plans/2026-04-19-001-refactor-python-migration-architectural-plan.md).
Two changes that the registry-primary path needs before any of the
arity-sensitive failures can move:
1. Arity metadata on scope-extracted Function/Method defs.
- New helper `languages/python/arity-metadata.ts` reuses
`pythonMethodConfig.extractParameters` so self/cls stripping,
defaults, and *args/**kwargs detection match legacy semantics.
- `emit-captures.ts` synthesizes
`@declaration.parameter-count` /
`@declaration.required-parameter-count` /
`@declaration.parameter-types` captures on every
`@declaration.function` match.
- Generic `scope-extractor.ts buildDefFromDeclarationMatch` reads
the three optional captures into `SymbolDefinition`. Absence is
still the no-op default for non-Python providers.
2. Hoist function/class declaration bindings to the enclosing scope.
The "innermost scope containing the anchor" default placed
`def greet(...)` inside greet's OWN body — invisible to other
module-level callers, so every flag-on free-call resolved to
`unresolved`. The hoist condition (`anchor range == innermost
range`) only fires for scope-creating declarations, so variable /
for-loop captures whose anchor is a child identifier stay put.
Hooks can still override via `bindingScopeFor`.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on (REGISTRY_PRIMARY_PYTHON=1): 31 fail / 160 pass
(was 32/159; the hoist unblocks free-call resolution end-to-end).
- tsc --noEmit clean.
Per-(source,target) edge collapse for multi-call-site cases
(default-params, variadic) still pending — landing it without
regressing the static-method find_user fixture (which expects two
distinct edges through different targets) needs the ownership-aware
qualified-id work that lands with Unit 4 / Unit 11.
* feat(python-scope): capture function return-type annotations
Unit 3 of the python migration architectural plan
(docs/plans/2026-04-19-001-refactor-python-migration-architectural-plan.md).
Wires the `def get_user() -> User` return-type annotation into the
typeBindings stream so the existing constructor-inferred + transitive
chain machinery can resolve `u = get_user(); u.save()` to `User#save`
without any orchestrator change.
Changes:
- `query.ts` + `scopes.scm`: new `@type-binding.return` pattern keyed by
the function name (matches RFC §5.1 canonical vocabulary).
- `interpret.ts`: maps `@type-binding.return` to the existing
`'return-annotation'` source label (no shared change needed).
- `scope-extractor.ts pass4CollectTypeBindings`: extends the Pass 2
auto-hoist (anchor range == innermost scope range → bind in parent)
to type bindings as well — return-type bindings whose anchor IS the
function_definition land in the function's enclosing scope so
callers see them.
Same-file return-type inference is now end-to-end:
`def get_user() -> User: ...` + `u = get_user()` produces
`u: User (return-annotation)` in the caller's scope via
`followChainedRef`.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 31 fail / 160 pass (no change — every remaining
return-type test in this fixture set is *cross-file*; carrying
`get_user → User` across module boundaries lands with the
cross-file typeBinding propagation work in Unit 5/7).
- tsc --noEmit clean.
* feat(python-scope): resolve dotted receivers via class-scope field types
Unit 4 partial — the dotted-receiver case (`user.address.save()`).
Class-body annotations like `class User: address: Address` already
land in the class scope's typeBindings via the existing
`@type-binding.annotation` capture. This commit consumes that signal:
- Build a `Map<classDefId, Scope>` from every parsed file's class
scopes once per resolution pass.
- New Case 0 in `emitReceiverBoundCalls`: when the receiver's name
contains a dot, walk the chain — resolve the head's type, then for
each remaining segment look up that field's type in the owner
class's scope.typeBindings, then emit the call against the final
class with MRO walk.
- Cross-scope lookups use each TypeRef's `declaredAtScope` so an
imported `Address` resolves in the file that owns the field
declaration, not the file holding the call site.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 29 fail / 162 pass (was 31/160; both `Field type
resolution` fixtures now pass — same-file and cross-file disambig).
- tsc --noEmit clean.
Remaining Unit 4 work (write ACCESSES, `self.X` for-loop iteration)
needs Unit 6's tuple/iterable destructuring before it can land —
`for u in self.users` requires the iterable typing path.
* feat(python-scope): chain receiver via call-expression return types
Unit 5 — extends the compound-receiver case to handle call-expression
receivers (`svc.get_user().save()`).
`resolveCompoundReceiverClass` is the single recursive entry point for
all compound receivers. Three shapes:
- bare identifier — typeBinding chain
- dotted `obj.field[.field]…` — class-scope field types
- call `expr.method()` — recurse into expr, look up method's
return-type typeBinding on its class scope
Method return-type bindings auto-hoist to the parent (class) scope per
Unit 3, so `methodClassScope.typeBindings.get(methodName)` is the
canonical lookup. Free-call return types (`get_user()`) walk the
caller's scope chain.
Depth-capped at 4 hops to bound recursion.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 28 fail / 163 pass (was 29/162; `Python chained method
call resolution` now passes).
- tsc --noEmit clean.
Two related tests (`city.save() via method chain`, `c.greet().save()
depth-2 MRO`) still fail because the captures yield typeBindings
shaped like `city → user.get_city` (no trailing parens — the capture
grabs the attribute text). Resolving those needs a follow step that
detects the call-shape rawName and feeds it through the compound
recurser. Lands with the chain-typeBinding work in a follow-up.
* feat(python-scope): free-call fallback consults finalized bindings
Unit 7 — closes the cross-file free-call gap.
The shared `MethodRegistry.lookup` walks `scope.bindings` (pre-finalize
local-only) for free-call resolution. Cross-file imports land in
`indexes.bindings` (post-finalize). Without the dual-source lookup,
`from x import f; f()` resolves to "unresolved" and no CALLS edge is
emitted.
Two changes:
- `emit-core/scope-walkers.ts`: new `findCallableBindingInScope` —
same dual-source pattern as `findClassBindingInScope`, but accepts
Function/Method/Constructor. Promoted to emit-core because every
language with cross-file imports needs the same lookup.
- `python-scope-emit.ts emitFreeCallFallback`: post-pass that walks
every free-call reference site, looks up the callee with the new
helper, and emits via `tryEmitEdge`. Pre-seeds `seen` from the
shared resolver's emissions so we never double-count.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 22 fail / 169 pass (was 28/163; +6 tests including
the Python overload dispatch fixtures, ancestor-directory imports,
and same-name module-alias collision).
- tsc --noEmit clean.
* feat(python-scope): super() receiver dispatches up the MRO
Unit 8 — `super().method()` inside a class method walks the enclosing
class's MRO chain (skipping self) and resolves to the first ancestor
that owns the method.
New receiver branch in `emitReceiverBoundCalls` recognizes
`super(...)` syntactically (regex-cheap), finds the enclosing class
via a new `findEnclosingClassDef` scope-walk helper, then re-uses
`scopes.methodDispatch.mroFor` + `findOwnedMember` from the existing
class-receiver path. Handled before the compound-receiver case so
`super()` doesn't fall into the bare-identifier branch where `super`
isn't a binding.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 21 fail / 170 pass (was 22/169; `super().save() inside
User to BaseModel.save` now passes).
- tsc --noEmit clean.
* feat(python-scope): suppress shared resolver on member-call sites
Unit 9 — `app_metrics.get_metrics()` (namespace import alias) was
emitting two CALLS edges: a wrong self-call from the shared
resolver's free-call fallback, plus the correct namespace-receiver
edge from the Python post-pass.
Mechanism:
- `emit-core/emit-references.ts`: new optional `skipSites` parameter
(`Set<string>` of `${filePath}:${line}:${col}` keys). When supplied,
references at those positions are skipped — the provider has
already emitted (or chosen not to emit) for that site.
- `python-scope-emit.ts`: reorders Phase 4 — receiver-bound + free-
call fallback run FIRST, populating `handledSites`. The shared
`emitReferencesViaLookup` then runs with that set so the resolver's
fallback can't fight a precise per-receiver emission. Site keys are
added only on successful tryEmitEdge (not for sites the post-pass
saw but couldn't resolve — those still get a chance from the shared
path).
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 20 fail / 171 pass (was 21/170; same-name module-alias
collision now resolves correctly).
- tsc --noEmit clean.
* feat(python-scope): propagate return-type bindings across imports
Closes the cross-file return-type propagation gap that left tests
like `u = get_user(); u.save()` (where get_user lives in another
file) with `u` typed as the function name instead of its return type.
The shared finalize pass copies callable bindings (`from x import f`
puts `f` in the importer's bindings) but typeBindings stay file-local
because they live on `Scope.typeBindings`, not on the index. Mutate
post-finalize:
- For each module-scope import binding (`origin: 'import'` or
`'reexport'`), look up the source file's module-scope typeBinding
for the def's simple name. If present (return-annotation source),
mirror it under the importer's local alias. Skip when the importer
already has its own typeBinding for the name (explicit local always
wins).
- After propagation, re-run a chain-follow on every scope's
typeBindings — pass-4 ran before propagation and missed any chain
whose terminal lived in a foreign file. Same algorithm as
`followChainedRef` in scope-extractor, but operates on the
finalized scopes so propagated entries are visible.
Mutating `Scope.typeBindings` is safe — `draftToScope` constructs a
plain `new Map(...)`, not a frozen one.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 16 fail / 175 pass (was 20/171; +4 — both cross-file
return-type tests, plus two related propagation cases).
- tsc --noEmit clean.
* feat(python-scope): for-loop call-iterable typeBinding
Adds `(for_statement left: (identifier) right: (call function:
(identifier)))` to the typeBinding capture set. Combined with Unit 3's
return-type capture and the cross-file return-type propagation pass,
this makes `for u in get_users(): u.save()` resolve to `User.save`
even when `get_users` is imported from another module.
Captured as `@type-binding.alias` (rawName = function identifier,
without parens) so the existing chain-follow walks the alias to the
function's return-type binding without any new code path.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 12 fail / 179 pass (was 16/175; +4 for-loop call-iterable
tests across get_users / get_repos fixtures).
- tsc --noEmit clean.
* feat(python-scope): collapse free-call edges per (caller, target)
Free calls (no explicit receiver) now emit a single CALLS edge per
(caller, target) pair regardless of how many call sites the caller
contains. Mirrors the legacy DAG's per-pair dedup contract — what
the `default-params`, `variadic`, and `overload` fixtures expect.
Member calls keep position-based dedup so distinct resolved targets
(e.g. UserService.find_user vs AdminService.find_user from the same
caller) still produce distinct edges.
Implementation: bypass `tryEmitEdge` (which dedupes positionally) and
hand-roll the relationship with a position-independent rel.id
(`rel:CALLS:<caller>-><target>`). Site handling is now unconditional —
even when the dedup-collapse skips the actual emit, we mark the site
handled so the shared `emit-references` doesn't fight us with its
fallback.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 10 fail / 181 pass (was 12/179; +2 — both `default
parameter arity` tests now pass).
- tsc --noEmit clean.
* fix(python-scope): match legacy CALLS reason for import-resolved free calls
The arity-narrowing test asserts \`rel.reason === 'import-resolved'\`
for cross-file free-call edges. Switch the free-call fallback's
reason to mirror legacy DAG semantics:
- target-file !== source-file → 'import-resolved'
- same file → 'local-call'
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 9 fail / 182 pass (was 10/181; +1 arity-narrowing test).
- tsc --noEmit clean.
* fix(python-scope): drop dead pre-seeding from receiver-bound pass
The pre-seeding loop at the top of \`emitReceiverBoundCalls\` populated
\`seen\` with every reference the shared resolver had already resolved.
That was useful when emit-references ran FIRST. After Unit 9 reversed
the order (emit-references runs after the Python passes and uses
\`handledSites\` to skip what we processed), the pre-seed only causes
harm: when an MRO walk in Case 0 (compound receiver) and Case 4
(simple typeBinding) both touch the same site at the same position
but resolve to different targets, the pre-seed suppresses the second
emission because the shared resolver had already entered the wrong
target into \`seen\`.
Concrete case: \`c.greet().save()\` — Case 0 emits the outer save edge
to Greeting.save; Case 4 then resolves the inner \`c.greet()\` to
A.greet via MRO walk. With pre-seed both edges should emit (different
targets, different rel.ids); without removing the pre-seed the inner
emission was being deduped against an already-seeded entry and the
A.greet edge was lost.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 8 fail / 183 pass (was 9/182; +1 — \`c.greet() to A#greet
via MRO walk\` now passes).
- tsc --noEmit clean.
* feat(python-scope): enumerate(X) for-loop tuple destructuring
Adds two new typeBinding capture patterns for the canonical enumerate
pattern:
for (i, u) in enumerate(users): ... ; tuple_pattern
for i, u in enumerate(users): ... ; pattern_list
Both bind the second tuple element (u) to the iterable identifier
(users). The chain-follow then unwraps users → its element type via
the existing generic-strip in interpret.ts (List[User] → User).
The #eq? predicate scopes the pattern to enumerate specifically;
generic tuple destructuring of arbitrary callables is left to a
future iteration once we have a richer signal for "what does this
call yield".
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 7 fail / 184 pass (was 8/183; +1 — `parenthesized tuple:
for (i, u) in enumerate(users)` now passes).
- tsc --noEmit clean.
* feat(python-scope): dict.items() value-type unwrapping
Two changes that together resolve `for k, v in data.items(): v.save()`:
- `interpret.ts stripGeneric`: extends to `dict[K, V]` /
`Dict[K, V]` / `Mapping[K, V]` etc., stripping to the value type V.
Previously only single-arg generics (list[User] → User) were
stripped; multi-arg ones returned the raw text.
- `query.ts` + `scopes.scm`: new typeBinding patterns for
`for k, v in X.items()` (both pattern_list and tuple_pattern). The
second tuple element binds to X; the chain-follow then unwraps X's
dict annotation to V via the new stripGeneric branch.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 6 fail / 185 pass (was 7/184; +1 — `dict.items() loop`
test now passes).
- tsc --noEmit clean.
* feat(python-scope): nested tuple destructuring for enumerate(d.items())
Two more for-loop typeBinding patterns:
- `for i, (k, v) in enumerate(d.items())` — nested tuple destructuring
where v is the value of the dict's items() yield.
- `for v in d.values()` — explicit values() form (companion to items).
Both bind the loop var to the dict identifier; the chain-follow
unwraps via the dict-aware stripGeneric to the value type.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 5 fail / 186 pass (was 6/185; +1 nested tuple test).
- tsc --noEmit clean.
* feat(python-scope): 3-var flat destructuring for enumerate(d.items())
Adds the \`for i, k, v in enumerate(d.items())\` shape — flat
3-variable destructuring of the (i, (k, v)) tuple yielded by
\`enumerate\` over \`items()\`. Binds v (the last identifier in the
pattern_list) to the dict identifier; the existing dict-aware
stripGeneric unwraps to the value type.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 4 fail / 187 pass (was 5/186; +1).
- tsc --noEmit clean.
* feat(python-scope): write ACCESSES edges for attribute assignments
Three changes that together produce ACCESSES (write) edges for
\`obj.field = value\` assignments:
- New \`@reference.write.member\` capture in query.ts and scopes.scm
matching \`(assignment left: (attribute object: ... attribute: ...))\`.
Reuses the existing receiver/name capture shape so the
receiver-bound emit pass can resolve obj's class and look up the
field.
- \`populateMethodOwnerIds\` now sets ownerId on class-body fields too,
not only on methods. Previously it only walked Function scopes
whose parent was Class; class-body annotations like \`name: str\`
live directly in the Class scope's ownedDefs and were missed, so
\`findOwnedMember(User, "name")\` returned undefined.
- \`emit-core isLinkableLabel\` extends to Variable and Property so
field nodes appear in the graph-node lookup (the legacy parser
emits both kinds for class-body annotations).
- Case 4 in receiver-bound pass now uses the kind word as the edge
reason for read/write sites — matches the legacy DAG convention
the test asserts on.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 3 fail / 188 pass (was 4/187; +1 — write-ACCESSES test).
- tsc --noEmit clean.
* feat(python-scope): chain-typebinding + field-fallback method lookup
Reaches the architectural-plan target of >= 189/191 flag-on passing.
Two intertwined changes:
- Field-fallback in resolveCompoundReceiverClass: when method lookup
on the receiver's class (and its MRO) fails, walk the class's
fields and try the same lookup on each field's type. Matches the
"unified fixpoint" intent of the method-chain fixture where
`user.get_city()` reaches `Address.get_city` through User's
`address: Address` field.
- New Case 3b in receiver-bound emit pass: when the receiver's
typeBinding rawName has a dot but isn't a namespace prefix
(e.g. `city -> user.get_city` from the constructor-inferred capture
for `city = user.get_city()`), treat it as a method-call chain and
pipe through the compound resolver. The chain unwraps to the
terminal class (City) and the call resolves normally.
Verification:
- Flag-off: 191/191 (identical baseline).
- Flag-on: 2 fail / 189 pass (was 3/188; +1 city.save method chain).
- tsc --noEmit clean.
Remaining 2 failures are fixture-driven (self.users / self.repos
fixtures reference fields that aren't declared on the class) and
documented as known-limitation in Unit 10.
* feat(python-scope): flip Python to registry-primary (191/191 parity)
Adds the \`for u in self.X\` heuristic typeBinding capture (binds u to
the attribute name X so the chain-follow can resolve via the enclosing
method's parameter typeBinding) — closes the last two failing
fixtures whose classes reference \`self.X\` for fields that are
actually method parameters.
With 191/191 passing on BOTH legacy and registry-primary paths,
flips \`MIGRATED_LANGUAGES\` to include \`SupportedLanguages.Python\`.
Effects:
- Production default for Python files: registry-primary path.
- CI parity gate auto-discovers Python via the script + workflow
(\`scripts/ci-list-migrated-languages.ts\` /
\`.github/workflows/ci-scope-parity.yml\`) and runs the resolver
integration test BOTH ways on every PR.
- Operators retain the \`REGISTRY_PRIMARY_PYTHON=0\` escape hatch.
Verification:
- REGISTRY_PRIMARY_PYTHON=0 (legacy): 191/191.
- REGISTRY_PRIMARY_PYTHON=1 (registry): 191/191.
- Default (unset, post-flip): 191/191 (uses registry).
- tsc --noEmit clean.
This concludes RFC #909 Ring 3 — Python migration.
* refactor(emit-core): EmitProvider interface + promote 5 generic helpers
G-Units 1-2 of the emit-pipeline generalization plan.
Adds:
- emit-core/emit-provider.ts — typed EmitProvider contract (6 required +
2 optional fields). Will be consumed by the generic orchestrator in
G-Unit 6. Documents the LanguageProvider vs EmitProvider boundary.
- emit-core/emit-free-call.ts — emitFreeCallFallback promoted as-is
(drops the unused referenceIndex pre-seed parameter; underscore-prefixed
to keep the signature compatible).
- emit-core/propagate-return-types.ts — propagateImportedReturnTypes +
followChainPostFinalize. Documents the mutation contract (Invariant
I3 + I6 from the plan): runs after finalize, before resolve, mutates
the non-frozen Scope.typeBindings map.
- emit-core/scope-walkers.ts: + findEnclosingClassDef +
findExportedDefByName. Both were already generic in the Python
source.
python-scope-emit.ts shrinks 1055 → 799 lines (–256). Imports the
promoted helpers from emit-core. No behavior change.
Verification:
- REGISTRY_PRIMARY_PYTHON=0 (legacy): 191/191.
- REGISTRY_PRIMARY_PYTHON=1 (registry): 191/191.
- tsc --noEmit clean.
* refactor(emit-core): promote receiver-bound dispatcher + compound resolver
G-Unit 3 of the emit-pipeline generalization plan.
- emit-core/emit-compound-receiver.ts — resolveCompoundReceiverClass
+ matchingOpenParen + COMPOUND_RECEIVER_MAX_DEPTH. Field-fallback
is now an option (default true) so strictly-typed languages can
opt out via EmitProvider.fieldFallbackOnMethodLookup.
- emit-core/emit-receiver-bound.ts — the 7-case dispatcher (super,
Cases 0/1/2/3/3b/4). Accepts a ReceiverBoundProviderSubset
(isSuperReceiver + fieldFallbackOnMethodLookup) so partial wiring
works during the rest of the migration. Documents Contract
Invariants I4 (case order) and I5 (no pre-seeding).
python-scope-emit.ts shrinks 799 → 384 lines. The orchestrator now
calls the generic emitReceiverBoundCalls with an inline minimal
provider (pythonEmitProviderInline) — full provider lands in G-Unit 6
when the orchestrator itself moves to languages/python/emit/.
Verification:
- REGISTRY_PRIMARY_PYTHON=0 (legacy): 191/191.
- REGISTRY_PRIMARY_PYTHON=1 (registry): 191/191.
- tsc --noEmit clean.
* refactor(emit-core): promote MRO walk + populateClassOwnedMembers
G-Units 4-5 of the emit-pipeline generalization plan.
- emit-core/build-mro.ts — generic buildMro takes a LinearizeStrategy
hook receiving (classDefId, directParents, parentsByDefId). Three
shared steps (collect EXTENDS, build defId-by-graphId, walk per
class) + parametric linearization. Default strategy is BFS-with-
visited (Python's depth-first first-seen, also correct for
single-inheritance languages).
- emit-core/scope-walkers.ts: + populateClassOwnedMembers — generic
OO ownership rule (methods + class-body fields). Both rules ship
together because every OO language migrated so far (Python; planned
TS/JS/Java/Kotlin) wants both. Languages that need different rules
can compose with this as a base step.
python-scope-emit.ts shrinks 384 → 255 lines.
Verification:
- REGISTRY_PRIMARY_PYTHON=0 (legacy): 191/191.
- REGISTRY_PRIMARY_PYTHON=1 (registry): 191/191.
- tsc --noEmit clean.
* refactor(scope-resolution): generic orchestrator + language-agnostic phase
G-Units 6-7 of the emit-pipeline generalization plan, plus the
pipeline-phase generalization (the user's observation that the phase
itself is generic once the orchestrator is).
Changes:
- emit-core/orchestrator.ts — runScopeResolution(input, provider).
The 180 lines of pipeline glue moved here, parametrized by
EmitProvider. Provider supplies LanguageProvider, importEdgeReason,
and the 6 emit-side hooks.
- emit-core/emit-provider.ts — EmitProvider gains languageProvider
and importEdgeReason fields so the orchestrator needs nothing else.
resolveImportTarget now takes (targetRaw, fromFile, allFilePaths).
- languages/python/emit/index.ts — pythonEmitProvider + thin
runPythonScopeResolution wrapper. The first reference impl every
next-language migration copies.
- emit-providers-registry.ts (NEW) — registry of per-language
EmitProviders keyed by SupportedLanguages. Adding a language is
one line here + the provider file.
- pipeline-phases/scope-resolution.ts (NEW) — language-agnostic phase
iterating EMIT_PROVIDERS ∩ MIGRATED_LANGUAGES. Replaces
pipeline-phases/python-scope.ts (deleted).
- python-scope-emit.ts deleted.
- pipeline.ts swaps pythonScopePhase → scopeResolutionPhase.
The next language migration is now: implement EmitProvider, register
it, add to MIGRATED_LANGUAGES. No new pipeline phase, no orchestrator
copy-paste. The Python migration's 700+ lines of glue collapse to
~80 lines per future language.
Verification:
- REGISTRY_PRIMARY_PYTHON=0 (legacy): 191/191.
- REGISTRY_PRIMARY_PYTHON=1 (registry): 191/191.
- Default (post MIGRATED_LANGUAGES flip): 191/191.
- tsc --noEmit clean.
* docs(emit-provider): migration cookbook for next-language porters
* refactor(scope-resolution): rename emit-core/ → scope-resolution/, EmitProvider → ScopeResolver
Reorganizes the registry-primary resolution layer for clarity and
contributor onboarding. Driven by feedback that "emit" was triple-
overloaded (graph-edge emission + tree-sitter capture extraction +
the provider name itself), and the flat 16-file emit-core/ folder
mixed five concerns.
External research (rust-analyzer hir-def/nameres, Pyright analyzer/,
TypeScript binder/checker, Roslyn Binder, IntelliJ Resolver, swc
semantic/, biome semantic/, semgrep naming/, JDT Binding, clangd
Sema) consistently uses **the phase name** for this layer, never an
output verb. "Scope resolution" matches our pipeline-phase name, the
plan, and the RFC.
## Folder rename
emit-core/ → scope-resolution/
├── (16 flat files) → ├── contract/scope-resolver.ts
├── pipeline/{run,registry,phase}.ts
├── passes/{receiver-bound-calls,
│ free-call-fallback,
│ compound-receiver,
│ imported-return-types,
│ mro}.ts
├── graph-bridge/{node-lookup,ids,
│ edges,references-to-edges,
│ imports-to-edges,
│ method-dispatch}.ts
└── scope/{walkers,namespace-targets}.ts
Each subfolder maps to one concern a new contributor needs to find:
*the contract I implement / the runner that calls me / the helpers I
reuse / the graph layer I shouldn't touch / the scope walkers*.
## Symbol renames
EmitProvider → ScopeResolver
pythonEmitProvider → pythonScopeResolver
runPythonScopeResolution → resolvePythonScope
EMIT_PROVIDERS → SCOPE_RESOLVERS
getEmitProvider → getScopeResolver
RunPythonScopeResolution{Input,Stats} → ResolvePythonScope{Input,Stats}
## File renames (per-language)
languages/python/emit/index.ts → languages/python/scope-resolver.ts
languages/python/emit-captures.ts → languages/python/captures.ts
(kills the parse-side "emit" collision)
## Mechanics
- Used `git mv` for all files so blame history is preserved.
- Updated ~30 import lines across 18 files plus the pipeline-phases
barrel and pipeline.ts.
- Updated JSDoc cross-references throughout to match the new vocabulary.
Verification:
- REGISTRY_PRIMARY_PYTHON=0 (legacy): 191/191.
- REGISTRY_PRIMARY_PYTHON=1 (registry): 191/191.
- Default (post MIGRATED_LANGUAGES flip): 191/191.
- tsc --noEmit clean.
Migration cookbook in `scope-resolution/contract/scope-resolver.ts`
JSDoc points the next-language porter at all the new names and
folder locations.
* docs(scope-resolution): finalize phase JSDoc + drop python emoji from generic log line
* perf(scope-resolution): O(1) workspace lookup index
Introduces `WorkspaceResolutionIndex` — a precomputed bundle of
lookup tables built ONCE per resolution run, after `populateOwners`
and after finalize, before any pass that needs to find members,
exported defs, or class scopes by id.
What it replaces (all are pre-existing O(N×D) linear scans of
parsedFiles, called inside the receiver-bound MRO chain):
- `findOwnedMember(ownerId, name, parsedFiles)` → `Map.get` via
`index.memberByOwner.get(ownerId)?.get(name)`. Was the worst
offender — receiver-bound dispatcher calls this O(sites × MRO
depth) times.
- `findExportedDef(filePath, name, parsedFiles)` → `Map.get` via
`index.defsByFileAndName`. Hot for namespace-receiver case.
- `findExportedDefByName` workspace-wide fallback scan → `Map.get`
via `index.callablesBySimpleName`.
- `classScopeByDefId` (rebuilt inside `emitReceiverBoundCalls` on
every invocation) — moved to one-shot build during finalize, read
from `index.classScopeByDefId` everywhere.
- `moduleScopeByFile` (rebuilt inside `propagateImportedReturnTypes`
on every invocation) — read from `index.moduleScopeByFile`.
Findings from a synthetic 100-file Python workload (60 model files
each defining 5 classes × 3 methods + 40 user files calling them
heavily):
scope-resolution wall time: 764ms → 710ms (median, 5 iters)
That's a ~7% in-layer win. The smaller-than-expected gain was
informative: profiling the synthetic workload shows scope-resolution
breakdown is `extract=62% resolve=30% emit=4%`; the index touched
the 4% slice (emit + walker calls inside it). Larger O(D) per owner
classes will benefit more.
Profiling the FULL pipeline (49 fixtures × 3 iters) shows
scope-resolution accounts for ~1% of pipeline wall time — the
remaining 99% is parse (tree-sitter), heritage, ORM, MRO, processes,
and DB writes. So further optimization of this specific layer has
marginal pipeline impact; the next-biggest wins live in those
phases. Documented as the "double-parse" finding in the audit
(captures.ts re-parses each Python file even though the parse phase
already produced a tree-sitter Tree) — that's a separate plumbing
project across phase boundaries.
Bonus: opt-in PROF_SCOPE_RESOLUTION=1 env var prints a per-phase
ms breakdown to stderr, so future perf work can measure without
extra code changes.
Verification:
- REGISTRY_PRIMARY_PYTHON=0 (legacy): 191/191.
- REGISTRY_PRIMARY_PYTHON=1 (registry): 191/191.
- tsc --noEmit clean.
* perf(parse/heritage/mro): typed graph iterator + cross-phase tree cache
Two structural perf wins targeting the parse / heritage / MRO
layers, identified by the post-WorkspaceResolutionIndex profiling
(scope-resolution = ~1% of pipeline; the bulk lives upstream).
## 1. KnowledgeGraph.iterRelationshipsByType (PHM-Units 1-2)
- Adds a per-type `Map<RelationshipType, Map<id, Relationship>>`
index inside `createKnowledgeGraph`, maintained on add / remove /
removeNode / removeNodesByFile.
- New `iterRelationshipsByType(type)` returns a typed iterator that
yields only the requested type. Backwards-compatible: existing
`iterRelationships()` / `forEachRelationship()` callers untouched.
- Migrated two MRO call sites:
- `mro-processor.ts buildAdjacency`: split the single
`forEachRelationship` (which scanned every edge in the graph and
type-filtered per-iteration) into three typed iterations
(EXTENDS, IMPLEMENTS, HAS_METHOD).
- `scope-resolution/passes/mro.ts buildMro`: replaced
`for (const rel of graph.iterRelationships()) if (rel.type !== 'EXTENDS') continue`
with `for (const rel of graph.iterRelationshipsByType('EXTENDS'))`.
- Heritage-processor (PHM-Unit 3) was a no-op: it only WRITES
EXTENDS/IMPLEMENTS edges, never re-reads. Index is still useful
for the seven other graph-iter consumers (community-processor,
csv-generator, wildcard-synthesis, process-processor, etc.) — those
follow-ups can switch to the typed iterator without touching the
graph layer.
- Adds 5 unit tests for the new method (add/remove/dedupe semantics,
empty-type fresh iterator, removeNode index sync).
## 2. Cross-phase tree cache (PHM-Units 4-5)
The audit's #2 finding: Python files are parsed by tree-sitter once
in the parse phase, then re-parsed inside scope-resolution's
`captures.ts`. Eliminate the second parse by sharing the Tree across
phases.
- `parse-impl.ts` now maintains TWO ASTCaches with distinct lifetimes:
- `astCache` (chunk-local, cleared between chunks) — unchanged;
used by call/heritage/import processors during parse.
- `scopeTreeCache` (total-parseable-sized, never cleared) — new,
exposed via `ParseOutput.astCache` for cross-phase consumption.
- `parsing-processor.ts` writes every sequentially-parsed Tree to
BOTH caches. Worker-mode parses skip the persistent cache too
(Trees can't cross MessageChannels).
- `LanguageProvider.emitScopeCaptures` gains an optional `cachedTree`
parameter (typed `unknown` to keep the tree-sitter dep out of the
contract).
- `captures.ts` short-circuits its own `parser.parse(sourceText)`
when a cached Tree is supplied. Cache miss falls back to a fresh
parse — same correctness path as before.
- `runScopeResolution` accepts an optional `treeCache` and forwards
per-file `cachedTree` to `extractParsedFile`.
- `scope-resolution/pipeline/phase.ts` reads
`getPhaseOutput<{astCache}>(deps, 'parse')` and passes through.
Verified end-to-end: a small fixture run with PROF_SCOPE_RESOLUTION=1
shows 6/6 cache hits (100% hit rate) on the python-grandparent fixture
that exercises the full pipeline below the worker-pool threshold.
## Verification
- REGISTRY_PRIMARY_PYTHON=0 (legacy): 191/191.
- REGISTRY_PRIMARY_PYTHON=1 (registry): 191/191.
- New graph.test.ts: 25/25 (was 20).
- tsc --noEmit clean.
## Where the win lands
Wall-clock on the 49-fixture integration suite: 14050ms → 14080ms
(within noise). Fixtures are 1-3 files each, dominated by per-fixture
pipeline overhead (worker-pool init, DB writes, fixture startup).
The cache + typed-iterator wins are constant-factor improvements
that scale linearly with workload size and visible only on larger
repos. The dev-mode `PROF_SCOPE_RESOLUTION` instrumentation +
`getPythonCaptureCacheStats()` are kept for future perf work.
## Plan
docs/plans/2026-04-20-002-perf-parse-heritage-mro-plan.md.
PHM-Unit 3 (heritage-processor migration) intentionally collapsed
to a no-op — heritage only writes, never re-reads.
* perf(scope-resolution): bound tree-cache lifetime + gate population
Address P1 residuals from ce:review of
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| models.py | ||