fix(python): suppress bare calls shadowed by an enclosing parameter

A Python `foo()` whose callee identifier is bound as a parameter of an
enclosing scope cannot be the module-level `foo` -- the parameter shadows it
for the whole body -- so resolving the call to a project Function/Method by a
weak short-name strategy fabricates the edge by construction:

    def _run_with_heavy_slot(run):
        return run()          # bound an unrelated SatoriLive.run

The receiver-aware weak-member guard (#1276) cannot see this class at all: a
bare call has no receiver, so is_method is false and the guard never fires.
This is the bare-call counterpart of python_receiver_is_exempt.

Keyed on the SCOPE FACT, not on the callee's spelling. A list of
generic-looking names (get / run / execute) asserts that certain spellings are
usually noise, which is a claim about corpus fashion rather than about what the
resolver knew, and it ages invisibly: nothing fails when the distribution
shifts, the graph just quietly loses different edges. A parameter binding is
decidable from this file's AST outright.

Parameters only, deliberately. A parameter is in scope for the entire body
regardless of position and Python forbids `global` on one, so no flow analysis
is needed. Local assignments are flow- and binding-form-sensitive (`for`,
`with as`, `except as`, `:=`, unpacking, plus global/nonlocal overrides); a
partial body scan would suppress the wrong edges invisibly -- the same failure
mode that rules out the name list. Enclosing scopes are walked to the file root
so a closure over an outer parameter counts.

Wired at both pass_calls.c and pass_parallel.c with an identical language gate:
a guard on one resolver only diverges the sequential and parallel paths. The
weak-strategy drop-list is now a single shared predicate used by both the member
guard and this one, so they cannot disagree about what "weak" means; a unit test
pins that agreement.

Tests pin both directions. The pipeline positive control is a cross-file bare
call with NO import, so it resolves by a weak strategy this guard could have
killed -- asserting a same_module edge would prove nothing, since no guard
touches same_module for any input. Verified by breaking the guard in both
directions: under-suppressing fails the negatives and the extraction flag;
over-suppressing fails the positives, so they are not vacuous. Disabling only
the pass_parallel.c gate fails only the >=50-file test and nothing else.

805 passed / 0 failed across pipeline registry parallel extraction complexity
lsp_resolution_probe.

The defect class was identified by Joseph-MingEn in #1386, which proposed a
name-keyed shape; the diagnosis is theirs.

Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
Co-authored-by: Joseph-MingEn <125283161+Joseph-MingEn@users.noreply.github.com>

internal/cbm/cbm.h

@@ -268,6 +268,10 @@ typedef struct {
                                         // pass_lsp_cross.c. Default false.
     bool requires_lsp_resolution;       // synthetic semantic candidate (for example an implicit
                                         // C++ operator). Never fall back to textual resolution.
+    bool callee_is_locally_bound;       // bare call foo() whose callee identifier is bound as a
+                                        // parameter of an enclosing function, so it cannot be the
+                                        // module-level foo. Python only today. Read by the
+                                        // weak-local-binding guard. Default false.
 } CBMCall;
 
 typedef struct {

internal/cbm/extract_calls.c

@@ -2800,6 +2800,86 @@ static bool python_receiver_is_exempt(CBMExtractCtx *ctx, TSNode receiver) {
     return false;
 }
 
+/* Name bound by one Python parameter node, or NULL when the shape binds none.
+ * Covers every binding form a `parameters` / `lambda_parameters` list produces:
+ * a bare `identifier`, the `name` field of default/typed parameters, and the
+ * identifier under a `*args` / `**kwargs` splat. A shape with no identifier (the
+ * bare `*` keyword separator) yields NULL and simply matches nothing. */
+static const char *python_parameter_name(CBMExtractCtx *ctx, TSNode param) {
+    if (ts_node_is_null(param)) {
+        return NULL;
+    }
+    if (strcmp(ts_node_type(param), "identifier") == 0) {
+        return cbm_node_text(ctx->arena, param, ctx->source);
+    }
+    TSNode name = ts_node_child_by_field_name(param, TS_FIELD("name"));
+    if (!ts_node_is_null(name) && strcmp(ts_node_type(name), "identifier") == 0) {
+        return cbm_node_text(ctx->arena, name, ctx->source);
+    }
+    /* `*args` / `**kwargs`, and any typed shape without a `name` field: the
+     * bound identifier is the first named child. */
+    TSNode first = ts_node_named_child(param, 0);
+    if (!ts_node_is_null(first) && strcmp(ts_node_type(first), "identifier") == 0) {
+        return cbm_node_text(ctx->arena, first, ctx->source);
+    }
+    return NULL;
+}
+
+/* True when the callee of a BARE Python call `foo()` is bound as a parameter of
+ * an enclosing function or lambda — the bare-call counterpart of
+ * python_receiver_is_exempt above.
+ *
+ * A parameter binding shadows any module-level `foo` for the whole body, so
+ * resolving such a call to a project Function/Method by short name alone
+ * fabricates the edge BY CONSTRUCTION: `def _run_with_heavy_slot(run): run()`
+ * must not bind an unrelated `SatoriLive.run`. Unlike a receiver type this is
+ * decidable from the AST outright, with no flow analysis and no list of
+ * "generic-looking" callee names — Python forbids `global` on a parameter, and a
+ * parameter is in scope for the entire body regardless of position, so there is
+ * no ordering subtlety to get wrong.
+ *
+ * Enclosing scopes are walked to the file root so a closure over an outer
+ * parameter counts (`def outer(run): def inner(): return run()`).
+ *
+ * LOCAL ASSIGNMENTS are deliberately NOT covered. They are flow- and
+ * binding-form-sensitive (`for`, `with ... as`, `except ... as`, `:=`,
+ * unpacking, plus `global`/`nonlocal` overrides), so a partial body scan would
+ * suppress the wrong edges invisibly — the same failure mode that rules out a
+ * hardcoded name list. Parameters alone already cover the Callable-parameter
+ * shape that motivated this guard. Cost is O(enclosing depth x params) per bare
+ * call, never the corpus.
+ *
+ * Known and accepted: `def inner(): global run; return run()` nested in a
+ * function whose parameter is `run` is still flagged. Detecting it needs exactly
+ * the body scan this helper avoids, and it costs one edge in a shape that
+ * essentially does not occur. */
+static bool python_callee_is_bound_parameter(CBMExtractCtx *ctx, TSNode call_node,
+                                             TSNode callee_ident) {
+    const char *callee_name = cbm_node_text(ctx->arena, callee_ident, ctx->source);
+    if (!callee_name || !callee_name[0]) {
+        return false;
+    }
+    for (TSNode scope = ts_node_parent(call_node); !ts_node_is_null(scope);
+         scope = ts_node_parent(scope)) {
+        const char *kind = ts_node_type(scope);
+        if (strcmp(kind, "function_definition") != 0 && strcmp(kind, "lambda") != 0) {
+            continue;
+        }
+        TSNode params = ts_node_child_by_field_name(scope, TS_FIELD("parameters"));
+        if (ts_node_is_null(params)) {
+            continue;
+        }
+        uint32_t count = ts_node_named_child_count(params);
+        for (uint32_t i = 0; i < count; i++) {
+            const char *pname = python_parameter_name(ctx, ts_node_named_child(params, i));
+            if (pname && strcmp(pname, callee_name) == 0) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
 static bool is_objectscript_language(CBMLanguage language) {
     return language == CBM_LANG_OBJECTSCRIPT_UDL || language == CBM_LANG_OBJECTSCRIPT_ROUTINE;
 }
@@ -3424,11 +3504,18 @@ CBMInvocationDescriptor handle_calls(CBMExtractCtx *ctx, TSNode node, const CBML
             // (`accelerator.print()` must not bind MockAccelerator.print).
             // Imported receivers stay unflagged: module.function() is Python's
             // canonical cross-file call and the import map resolves it.
+            // A BARE Python call foo() whose callee is bound as a parameter of an
+            // enclosing scope cannot be the module-level foo, so short-name
+            // resolution would fabricate the edge (`def f(run): run()` must not
+            // bind SatoriLive.run). Distinct from is_method: there is no receiver
+            // here, so the weak-member guard cannot see this class at all.
             if (ctx->language == CBM_LANG_PYTHON && strcmp(ts_node_type(node), "call") == 0) {
                 TSNode fn = ts_node_child_by_field_name(node, TS_FIELD("function"));
                 if (!ts_node_is_null(fn) && strcmp(ts_node_type(fn), "attribute") == 0) {
                     TSNode obj = ts_node_child_by_field_name(fn, TS_FIELD("object"));
                     call.is_method = !python_receiver_is_exempt(ctx, obj);
+                } else if (!ts_node_is_null(fn) && strcmp(ts_node_type(fn), "identifier") == 0) {
+                    call.callee_is_locally_bound = python_callee_is_bound_parameter(ctx, node, fn);
                 }
             }
             // TS/JS/TSX receiver-aware guard (#592/#606 direction; same intent

src/pipeline/pass_calls.c

@@ -627,8 +627,16 @@ static int resolve_single_call(cbm_pipeline_ctx_t *ctx, CBMCall *call,
     bool suppress_weak_member = lang == CBM_LANG_PYTHON || lang == CBM_LANG_JAVASCRIPT ||
                                 lang == CBM_LANG_TYPESCRIPT || lang == CBM_LANG_TSX ||
                                 lang == CBM_LANG_ARKTS;
+    /* Bare-call local-binding suppression. A member call has a receiver the
+     * guard above can reason about; a bare `run()` has none, so that guard
+     * cannot see this class at all. Python-only today because the extraction
+     * flag is set only for Python — this gate MUST match pass_parallel.c's
+     * exactly, for the same divergence reason noted above. */
+    bool suppress_weak_local_binding = lang == CBM_LANG_PYTHON;
     bool drop_plain_call =
-        cbm_suppress_weak_member_match(suppress_weak_member, call->is_method, res.strategy);
+        cbm_suppress_weak_member_match(suppress_weak_member, call->is_method, res.strategy) ||
+        cbm_suppress_weak_local_binding_call(suppress_weak_local_binding,
+                                             call->callee_is_locally_bound, res.strategy);
 
     /* Service-pattern HTTP/ASYNC calls to an EXTERNAL client library (e.g.
      * `requests.get("/api/orders/{id}")`) resolve to a QN containing the library

src/pipeline/pass_parallel.c

@@ -2482,8 +2482,13 @@ static void resolve_file_calls(resolve_ctx_t *rc, resolve_worker_state_t *ws, CB
         bool suppress_weak_member = lang == CBM_LANG_PYTHON || lang == CBM_LANG_JAVASCRIPT ||
                                     lang == CBM_LANG_TYPESCRIPT || lang == CBM_LANG_TSX ||
                                     lang == CBM_LANG_ARKTS;
+        /* Bare-call local-binding suppression — see the note in pass_calls.c.
+         * This gate MUST stay identical to the one there. */
+        bool suppress_weak_local_binding = lang == CBM_LANG_PYTHON;
         bool drop_plain_call =
-            cbm_suppress_weak_member_match(suppress_weak_member, call->is_method, res.strategy);
+            cbm_suppress_weak_member_match(suppress_weak_member, call->is_method, res.strategy) ||
+            cbm_suppress_weak_local_binding_call(suppress_weak_local_binding,
+                                                 call->callee_is_locally_bound, res.strategy);
 
         /* Service-pattern HTTP/ASYNC client call (`requests.get(url)`): the
          * service signal lives in the callee_name. The registry can mis-resolve

src/pipeline/pipeline.h

@@ -280,6 +280,18 @@ bool cbm_perl_suppress_generic_match(bool is_perl, bool is_method, const char *c
  * Pure; unit-tested in test_registry.c. */
 bool cbm_suppress_weak_member_match(bool enabled, bool is_method, const char *strategy);
 
+/* Bare-call counterpart of the guard above. True when a resolved BARE call edge
+ * binds a callee that is shadowed by an enclosing parameter, and the match came
+ * from a weak short-name strategy — so the edge is fabricated by construction
+ * (`def f(run): run()` must not bind an unrelated `SatoriLive.run`). Shares the
+ * member guard's drop-list, so lsp_* / import / same-module matches are kept.
+ * Deliberately keyed on the SCOPE FACT, not on the callee's spelling. The
+ * language set lives at the call sites (pass_calls.c / pass_parallel.c) and must
+ * be identical in both, or the sequential and parallel resolvers diverge.
+ * Pure; unit-tested in test_registry.c. */
+bool cbm_suppress_weak_local_binding_call(bool enabled, bool callee_is_locally_bound,
+                                          const char *strategy);
+
 /* #725: drop a suffix_match CALLS edge when the caller language and the
  * target file's language disagree. unique_name (candidates == 1) is #1572
  * and is left alone; same_module / import_map / lsp_* are kept. JS/TS/TSX

src/pipeline/registry.c

@@ -448,22 +448,59 @@ bool cbm_perl_suppress_generic_match(bool is_perl, bool is_method, const char *c
  * per-language decision made at the call sites in pass_calls.c and
  * pass_parallel.c, which MUST stay in lockstep — a gate added to only one of
  * them diverges the sequential and parallel resolvers. */
-bool cbm_suppress_weak_member_match(bool enabled, bool is_method, const char *strategy) {
-    if (!enabled || !is_method || !strategy || !strategy[0]) {
+/* The weak short-name strategies that actually reach the call-resolution
+ * guards: the registry's suffix_match / unique_name and the parallel
+ * field_type_hint. "fuzzy" is listed as defensive insurance only —
+ * cbm_registry_fuzzy_resolve is not wired into the sequential/parallel resolvers
+ * today, so it never reaches these helpers, but naming it keeps a future wiring
+ * from silently reintroducing the noise. Everything else — same_module /
+ * import_map / import_map_suffix / qualified_suffix / callee_suffix /
+ * service_pattern / lsp_* — is a receiver- or import-aware match and is KEPT.
+ *
+ * Shared by BOTH weak-call guards below so the drop-list exists exactly once: a
+ * list that drifted between the member guard and the local-binding guard would
+ * make the two disagree about what "weak" means. */
+static bool weak_short_name_strategy(const char *strategy) {
+    if (!strategy || !strategy[0]) {
         return false;
     }
-    /* Weak short-name strategies that actually reach the call-resolution guards:
-     * the registry's suffix_match / unique_name and the parallel field_type_hint.
-     * "fuzzy" is listed as defensive insurance only — cbm_registry_fuzzy_resolve
-     * is not wired into the sequential/parallel resolvers today, so it never
-     * reaches this helper, but naming it keeps a future wiring from silently
-     * reintroducing the noise. Everything else — same_module / import_map /
-     * import_map_suffix / qualified_suffix / callee_suffix / service_pattern /
-     * lsp_* — is a receiver- or import-aware match and is KEPT. */
     return strcmp(strategy, "suffix_match") == 0 || strcmp(strategy, "unique_name") == 0 ||
            strcmp(strategy, "field_type_hint") == 0 || strcmp(strategy, "fuzzy") == 0;
 }
 
+bool cbm_suppress_weak_member_match(bool enabled, bool is_method, const char *strategy) {
+    if (!enabled || !is_method) {
+        return false;
+    }
+    return weak_short_name_strategy(strategy);
+}
+
+/* Bare-call counterpart of the member guard above. A Python call `foo()` whose
+ * callee identifier is bound as a parameter of an enclosing scope cannot be the
+ * module-level `foo`: the parameter shadows it for the whole body. Binding such
+ * a call to a project Function/Method by a weak short-name strategy fabricates
+ * the edge by construction (`def _run_with_heavy_slot(run): run()` ->
+ * SatoriLive.run).
+ *
+ * This is deliberately NOT keyed on the callee's spelling. A list of
+ * "generic-looking" names (get / run / execute) asserts that certain spellings
+ * are usually noise, which is a claim about corpus fashion rather than about
+ * what the resolver knew — and it ages invisibly, because nothing fails when the
+ * distribution shifts, the graph just quietly loses different edges. A parameter
+ * binding is a fact about THIS file's scope, decidable outright.
+ *
+ * `enabled` is the caller's per-language gate, kept out of the helper for the
+ * same reason as the member guard: the two call sites in pass_calls.c and
+ * pass_parallel.c MUST enumerate the identical language set, or the sequential
+ * and parallel resolvers diverge. Pure; unit-tested in test_registry.c. */
+bool cbm_suppress_weak_local_binding_call(bool enabled, bool callee_is_locally_bound,
+                                          const char *strategy) {
+    if (!enabled || !callee_is_locally_bound) {
+        return false;
+    }
+    return weak_short_name_strategy(strategy);
+}
+
 static bool js_ts_family(CBMLanguage lang) {
     return lang == CBM_LANG_JAVASCRIPT || lang == CBM_LANG_TYPESCRIPT || lang == CBM_LANG_TSX ||
            lang == CBM_LANG_ARKTS;

tests/test_extraction.c

@@ -4621,6 +4621,85 @@ TEST(extract_python_member_call_flags_is_method) {
     PASS();
 }
 
+/* Python bare-call local-binding flag (the bare-call counterpart of the
+ * receiver flag above). Pins BOTH directions: a callee shadowed by a parameter
+ * of an enclosing scope IS flagged so the resolver can suppress a weak
+ * short-name match, while an unshadowed callee — a genuine module-level
+ * function, an imported name, or a nested `def` — is NOT, so its true edge
+ * survives. Every parameter binding form the grammar produces is covered, since
+ * a form the extractor silently missed would leave that shape unguarded. */
+TEST(extract_python_bare_call_flags_locally_bound_callee) {
+    CBMFileResult *r = extract("from pkg import helper\n"
+                               "\n"
+                               "def outer(run, *rest, timeout=5, label: str = 'x', **opts):\n"
+                               "    def inner():\n"
+                               "        return run()\n"
+                               "    rest()\n"
+                               "    timeout()\n"
+                               "    label()\n"
+                               "    opts()\n"
+                               "    module_level()\n"
+                               "    helper()\n"
+                               "    return inner()\n"
+                               "\n"
+                               "def typed(cb: Callable):\n"
+                               "    return cb()\n"
+                               "\n"
+                               "apply_it = lambda fn: fn()\n",
+                               CBM_LANG_PYTHON, "t", "x.py");
+    ASSERT_NOT_NULL(r);
+    ASSERT_FALSE(r->has_error);
+
+    /* callee name -> (expected flag, seen count) */
+    struct {
+        const char *callee;
+        bool expect_bound;
+        int seen;
+    } cases[] = {
+        {"run", true, 0},      /* closure over an ENCLOSING function's parameter */
+        {"rest", true, 0},     /* *args   -> list_splat_pattern                  */
+        {"timeout", true, 0},  /* default_parameter                              */
+        {"label", true, 0},    /* typed_default_parameter (keyword-only)         */
+        {"opts", true, 0},     /* **kwargs -> dictionary_splat_pattern           */
+        {"cb", true, 0},       /* typed_parameter, no default                    */
+        {"fn", true, 0},       /* lambda parameter                               */
+        {"module_level", false, 0}, /* unbound: the true cross-file edge         */
+        {"helper", false, 0},       /* imported name, not a parameter            */
+        {"inner", false, 0},        /* nested def: a real target, keep the edge  */
+    };
+    const int case_count = (int)(sizeof(cases) / sizeof(cases[0]));
+
+    for (int i = 0; i < r->calls.count; i++) {
+        const char *cn = r->calls.items[i].callee_name;
+        if (!cn) {
+            continue;
+        }
+        for (int c = 0; c < case_count; c++) {
+            if (strcmp(cn, cases[c].callee) != 0) {
+                continue;
+            }
+            cases[c].seen++;
+            if (r->calls.items[i].callee_is_locally_bound != cases[c].expect_bound) {
+                printf("  bare-call flag mismatch for %s(): got %d, expected %d\n", cases[c].callee,
+                       r->calls.items[i].callee_is_locally_bound ? 1 : 0,
+                       cases[c].expect_bound ? 1 : 0);
+            }
+            ASSERT_EQ(r->calls.items[i].callee_is_locally_bound, cases[c].expect_bound);
+        }
+    }
+    /* Each shape must appear exactly once, so a missed extraction cannot let the
+     * loop above pass vacuously. */
+    for (int c = 0; c < case_count; c++) {
+        if (cases[c].seen != 1) {
+            printf("  bare call %s() extracted %d times, expected 1\n", cases[c].callee,
+                   cases[c].seen);
+        }
+        ASSERT_EQ(cases[c].seen, 1);
+    }
+    cbm_free_result(r);
+    PASS();
+}
+
 /* TS/JS/TSX receiver-aware flag (#592/#606; same intent as the Perl flag above).
  * A member call x.foo() with a non-this/super receiver is flagged is_method so
  * the resolver can suppress a weak short-name match (`re.test()` must not bind a
@@ -6300,6 +6379,7 @@ SUITE(extraction) {
     RUN_TEST(extract_perl_method_call_flags_is_method);
     RUN_TEST(extract_flag_exempt_method_call_not_flagged_is_method);
     RUN_TEST(extract_python_member_call_flags_is_method);
+    RUN_TEST(extract_python_bare_call_flags_locally_bound_callee);
     RUN_TEST(extract_ts_member_call_flags_is_method);
     RUN_TEST(extract_ts_this_super_receiver_not_flagged);
     RUN_TEST(extract_js_member_call_flags_is_method);

tests/test_pipeline.c

@@ -4836,6 +4836,60 @@ TEST(pipeline_tsjs_receiver_parallel_keeps_service_edges) {
     PASS();
 }
 
+/* Python bare-call local-binding suppression, sequential path. The bare-call
+ * counterpart of the receiver guard above: `run` is a PARAMETER, so `run()`
+ * cannot be the module-level `run` and must not bind SatoriLive.run.
+ *
+ * The positive control is deliberately a CROSS-FILE bare call with no import,
+ * so it resolves by a weak short-name strategy — one this guard could have
+ * killed. Asserting a same-file (same_module) edge instead would prove nothing,
+ * because no guard in this codebase touches same_module for any input.
+ * Fewer than 50 files exercises pass_calls.c. */
+TEST(pipeline_python_bare_local_binding_suppresses_weak_edge) {
+    char tmp[256];
+    snprintf(tmp, sizeof(tmp), "/tmp/cbm_py_bare_seq_XXXXXX");
+    if (!cbm_mkdtemp(tmp)) {
+        FAIL("tmpdir");
+    }
+
+    write_temp_file(tmp, "live.py",
+                    "class SatoriLive:\n"
+                    "    def run(self):\n"
+                    "        return 1\n");
+    write_temp_file(tmp, "helpers.py",
+                    "def compute_widget_total():\n"
+                    "    return 7\n");
+    write_temp_file(tmp, "gate.py",
+                    "def _run_with_heavy_slot(run):\n"
+                    "    return run()\n"
+                    "\n"
+                    "def uses_free_function():\n"
+                    "    return compute_widget_total()\n");
+
+    char db_path[512];
+    snprintf(db_path, sizeof(db_path), "%s/py_bare.db", tmp);
+    cbm_pipeline_t *p = cbm_pipeline_new(tmp, db_path, CBM_MODE_FULL);
+    ASSERT_NOT_NULL(p);
+    ASSERT_EQ(cbm_pipeline_run(p), 0);
+    const char *project = cbm_pipeline_project_name(p);
+
+    cbm_store_t *s = cbm_store_open_path(db_path);
+    ASSERT_NOT_NULL(s);
+
+    /* NEGATIVE: the callee is shadowed by a parameter. */
+    ASSERT_FALSE(cross_file_call_exists(s, project, "_run_with_heavy_slot", "run"));
+    /* POSITIVE: an unshadowed cross-file bare call survives. */
+    ASSERT_TRUE(cross_file_call_exists(s, project, "uses_free_function", "compute_widget_total"));
+    /* Tripwire: a run that emitted no edges at all would satisfy the negative
+     * assertion vacuously. */
+    ASSERT_GTE(cbm_store_count_edges_by_type(s, project, "CALLS"), 1);
+
+    cbm_store_close(s);
+    cbm_pipeline_free(p);
+    th_rmtree(tmp);
+    PASS();
+}
+
 /* Parallel Python regression for #1276. The field-type heuristic capitalizes
  * the receiver token and previously promoted accelerator.print() to
  * MockAccelerator.print at 0.85; ordinary suffix matching also selected one
@@ -4933,6 +4987,78 @@ TEST(pipeline_python_receiver_parallel_suppresses_weak_method_edges) {
     PASS();
 }
 
+/* Parallel counterpart. >= 50 files forces pass_parallel.c, which is wired with
+ * the same gate: a guard wired on only one resolver produces an edge on the
+ * sequential path and not the parallel one, breaking MT determinism. #1386
+ * wired both and tested only the sequential path, and the `parallel` suite is
+ * exactly what catches that. Same both-directions pin as the sequential test. */
+TEST(pipeline_python_bare_local_binding_parallel_suppresses_weak_edge) {
+    char tmp[256];
+    snprintf(tmp, sizeof(tmp), "/tmp/cbm_py_bare_par_XXXXXX");
+    if (!cbm_mkdtemp(tmp)) {
+        FAIL("tmpdir");
+    }
+
+    write_temp_file(tmp, "live.py",
+                    "class SatoriLive:\n"
+                    "    def run(self):\n"
+                    "        return 1\n"
+                    "\n"
+                    "class BatchJob:\n"
+                    "    def execute(self):\n"
+                    "        return 2\n");
+    write_temp_file(tmp, "helpers.py",
+                    "def compute_widget_total():\n"
+                    "    return 7\n");
+    write_temp_file(tmp, "gate.py",
+                    "def _run_with_heavy_slot(run, execute):\n"
+                    "    run()\n"
+                    "    return execute()\n"
+                    "\n"
+                    "def uses_free_function():\n"
+                    "    return compute_widget_total()\n");
+    for (int i = 0; i < 52; i++) {
+        char name[64];
+        char body[128];
+        snprintf(name, sizeof(name), "filler%d.py", i);
+        snprintf(body, sizeof(body), "def filler%d():\n    return %d\n", i, i);
+        write_temp_file(tmp, name, body);
+    }
+
+    char *old_workers = getenv("CBM_WORKERS");
+    char *saved = old_workers ? strdup(old_workers) : NULL;
+    cbm_setenv("CBM_WORKERS", "4", 1);
+
+    char db_path[512];
+    snprintf(db_path, sizeof(db_path), "%s/py_bare_par.db", tmp);
+    cbm_pipeline_t *p = cbm_pipeline_new(tmp, db_path, CBM_MODE_FULL);
+    ASSERT_NOT_NULL(p);
+    ASSERT_EQ(cbm_pipeline_run(p), 0);
+    const char *project = cbm_pipeline_project_name(p);
+
+    cbm_store_t *s = cbm_store_open_path(db_path);
+    ASSERT_NOT_NULL(s);
+
+    /* NEGATIVE: both callees are shadowed by parameters. */
+    ASSERT_FALSE(cross_file_call_exists(s, project, "_run_with_heavy_slot", "run"));
+    ASSERT_FALSE(cross_file_call_exists(s, project, "_run_with_heavy_slot", "execute"));
+    /* POSITIVE: the unshadowed cross-file bare call survives the parallel path. */
+    ASSERT_TRUE(cross_file_call_exists(s, project, "uses_free_function", "compute_widget_total"));
+    /* Tripwire against a vacuous pass. */
+    ASSERT_GTE(cbm_store_count_edges_by_type(s, project, "CALLS"), 1);
+
+    cbm_store_close(s);
+    cbm_pipeline_free(p);
+    if (saved) {
+        cbm_setenv("CBM_WORKERS", saved, 1);
+        free(saved);
+    } else {
+        cbm_unsetenv("CBM_WORKERS");
+    }
+    th_rmtree(tmp);
+    PASS();
+}
+
 /* Reproduce-first: pass_parallel's fused cross-LSP eligibility currently counts
  * only parser-backed calls/call references. A Python binary operator has no
  * parser CBMCall; its __add__ semantic record and carrier are created together
@@ -12807,6 +12933,8 @@ SUITE(pipeline) {
     RUN_TEST(pipeline_python_receiver_suppresses_weak_method_edge);
     RUN_TEST(pipeline_tsjs_receiver_parallel_keeps_service_edges);
     RUN_TEST(pipeline_python_receiver_parallel_suppresses_weak_method_edges);
+    RUN_TEST(pipeline_python_bare_local_binding_suppresses_weak_edge);
+    RUN_TEST(pipeline_python_bare_local_binding_parallel_suppresses_weak_edge);
     RUN_TEST(pipeline_parallel_python_cross_only_dunder_gets_synthetic_carrier);
     RUN_TEST(pipeline_parallel_rust_cross_only_macro_hidden_gets_synthetic_carrier);
     RUN_TEST(pipeline_native_fetch_classified_as_http_calls);

tests/test_registry.c

@@ -853,6 +853,66 @@ TEST(dynamic_suppress_keeps_high_confidence_and_non_methods) {
     PASS();
 }
 
+TEST(local_binding_suppress_drops_weak_shadowed_bare_calls) {
+    /* A bare `run()` whose callee is a parameter of an enclosing scope cannot be
+     * the module-level `run`, so a weak short-name match fabricates the edge. */
+    ASSERT_TRUE(cbm_suppress_weak_local_binding_call(true, true, "suffix_match"));
+    ASSERT_TRUE(cbm_suppress_weak_local_binding_call(true, true, "unique_name"));
+    ASSERT_TRUE(cbm_suppress_weak_local_binding_call(true, true, "field_type_hint"));
+    ASSERT_TRUE(cbm_suppress_weak_local_binding_call(true, true, "fuzzy"));
+    PASS();
+}
+
+TEST(local_binding_suppress_keeps_unshadowed_and_strong_strategies) {
+    /* THE RECALL PIN. A bare call to a genuine module-level function is NOT
+     * locally bound, so it is never suppressed — whatever the callee is spelled.
+     * This is the assertion a name-keyed guard (get/run/execute) would fail: it
+     * would drop these purely because of how the callee reads. */
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, false, "suffix_match"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, false, "unique_name"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, false, "field_type_hint"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, false, "fuzzy"));
+    /* Every receiver-/import-aware strategy is kept even when shadowed. */
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "same_module"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "import_map"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "import_map_suffix"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "qualified_suffix"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "callee_suffix"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "service_pattern"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "lsp_cross"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "lsp_py_method"));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, "lsp_direct"));
+    /* Languages outside the caller's gate are never affected. */
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(false, true, "suffix_match"));
+    /* No match (NULL/empty strategy) → nothing to suppress. */
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, NULL));
+    ASSERT_FALSE(cbm_suppress_weak_local_binding_call(true, true, ""));
+    PASS();
+}
+
+TEST(weak_call_guards_share_one_drop_list) {
+    /* The member guard and the local-binding guard must agree on what "weak"
+     * means. They share a single static predicate for exactly this reason; if
+     * someone re-inlines one of the lists and edits only that copy, the two
+     * guards start disagreeing and this test catches it at the contract level
+     * rather than in a corpus months later. */
+    static const char *const strategies[] = {
+        "suffix_match",  "unique_name",   "field_type_hint", "fuzzy",       "same_module",
+        "import_map",    "import_map_suffix", "qualified_suffix", "callee_suffix",
+        "service_pattern",   "lsp_cross", "lsp_ts_method", "lsp_py_method", "lsp_direct",
+        "",              NULL};
+    for (int i = 0; strategies[i] != NULL; i++) {
+        bool member = cbm_suppress_weak_member_match(true, true, strategies[i]);
+        bool binding = cbm_suppress_weak_local_binding_call(true, true, strategies[i]);
+        if (member != binding) {
+            printf("  drop-list divergence on strategy \"%s\": member=%d binding=%d\n",
+                   strategies[i], member, binding);
+        }
+        ASSERT_EQ(member, binding);
+    }
+    PASS();
+}
+
 /* ── Suite ─────────────────────────────────────────────────────── */
 
 /* Method call THROUGH an imported symbol that is itself an indexed node
@@ -947,4 +1007,7 @@ SUITE(registry) {
     RUN_TEST(cross_language_suffix_match_drops_py_vs_js);
     RUN_TEST(dynamic_suppress_drops_weak_method_matches);
     RUN_TEST(dynamic_suppress_keeps_high_confidence_and_non_methods);
+    RUN_TEST(local_binding_suppress_drops_weak_shadowed_bare_calls);
+    RUN_TEST(local_binding_suppress_keeps_unshadowed_and_strong_strategies);
+    RUN_TEST(weak_call_guards_share_one_drop_list);
 }