diff --git a/gitgalaxy/standards/language_standards.py b/gitgalaxy/standards/language_standards.py
index 3a8f828f..bcf8bd05 100644
--- a/gitgalaxy/standards/language_standards.py
+++ b/gitgalaxy/standards/language_standards.py
@@ -11961,11 +11961,11 @@ class PrismConfigSchema(TypedDict):
             # 4. func_start (Executable Logic Anchors)
             # MUST HAVE EXACTLY ONE CAPTURE GROUP.
             # Captures standard procs and namespaced procs (e.g., `proc ::my::func`).
-            "func_start": re.compile(r"^[ \t]*proc[ \t]+([a-zA-Z0-9_:]+)(?=[ \t]*\{|[ \t\n]|$)", re.M),
+            "func_start": re.compile(r"^[ \t]*proc[ \t\n]+([a-zA-Z0-9_:]+)(?=[ \t]*\{|[ \t\n]|$)", re.M),
             # 5. class_start (Object / Entity Declarations)
             # Captures TclOO, Snit, and Itcl class definitions.
             "class_start": re.compile(
-                r"^[ \t]*(?:oo::class[ \t]+create|snit::type|itcl::class)[ \t]+([a-zA-Z0-9_:]+)(?=[ \t]*\{|[ \t\n]|$)",
+                r"^[ \t]*(?:oo::class[ \t\n]+create|snit::type|itcl::class)[ \t\n]+([a-zA-Z0-9_:]+)(?=[ \t]*\{|[ \t\n]|$)",
                 re.M,
             ),
             # --- PHASE 2: RISK & STRUCTURAL INTEGRITY ---
@@ -12036,6 +12036,11 @@ class PrismConfigSchema(TypedDict):
             # 24. import (Dependency Inclusions)
             # Package and module loading.
             "import": re.compile(r"^[ \t]*(?:package[ \t]+require|source|load)\b", re.M),
+            "dependency_injection": None,
+            "_dependency_capture": re.compile(
+                r"^[ \t]*(?:package[ \t\n]+require|source|load)[ \t\n]+(?:-exact[ \t\n]+)?(?:\{?[\"']?)([^\"'\s#{}]+)",
+                re.M,
+            ),
             # 25. ownership (Authorship Metadata)
             "ownership": re.compile(
                 r"^[ \t]*#[ \t]*(?:Author|Created by|Maintainer|Copyright):\s+(.*)",
@@ -12061,7 +12066,6 @@ class PrismConfigSchema(TypedDict):
             # 32. events (Event Emitters / Pub-Sub)
             # Tcl event bindings and file event handlers.
             "events": re.compile(r"\b(?:bind|fileevent|vwait|trace[ \t]+add)\b"),
-            "dependency_injection": None,
             "macros": None,
             "pointers": None,
             "memory_alloc": None,
diff --git a/tests/extraction/languages/test_tcl.py b/tests/extraction/languages/test_tcl.py
new file mode 100644
index 00000000..55423d7a
--- /dev/null
+++ b/tests/extraction/languages/test_tcl.py
@@ -0,0 +1,163 @@
+"""
+Tcl extraction hardening (epic #848). See
+tests/extraction/how_to_harden_extraction.md for the methodology.
+
+Covers all four extraction gauntlets for tcl in one file: func_start,
+args, class_start, _dependency_capture.
+"""
+
+import sys
+from pathlib import Path
+from typing import Any
+
+import pytest
+
+from gitgalaxy.standards.language_standards import LANGUAGE_DEFINITIONS
+
+_EXTRACTION_DIR = str(Path(__file__).resolve().parent.parent)
+if _EXTRACTION_DIR not in sys.path:
+    sys.path.insert(0, _EXTRACTION_DIR)
+
+from _extraction_harness import (  # noqa: E402
+    assert_invalid_no_match,
+    assert_pathological_dependency_match,
+    assert_pathological_match,
+    assert_valid_dependency_match,
+    assert_valid_match,
+)
+
+TCL_RULES = LANGUAGE_DEFINITIONS["tcl"]["rules"]
+
+FUNCTION_CASES: dict[str, Any] = {
+    "valid": [
+        ("proc TargetFunc {", "TargetFunc"),
+        ("proc TargetFunc {a b} {", "TargetFunc"),
+        ("proc ::namespace::TargetFunc {args} {", "TargetFunc"),
+    ],
+    "invalid": [
+        "set TargetFunc",
+        "if {$TargetFunc}",
+        "TargetFunc a b",
+        "if {$a == $b} {",
+        "set proc TargetFunc",
+        'puts "proc TargetFunc {"',
+    ],
+    "pathological": [
+        ("proc \t TargetFunc \t {", "TargetFunc"),
+        ("proc   TargetFunc {", "TargetFunc"),
+        ("proc \n ::namespace::TargetFunc \n { \n a \n b \n } \n {", "TargetFunc"),
+    ],
+}
+
+ARGS_CASES: dict[str, Any] = {
+    "valid": [
+        ("proc TargetFunc {a b} {", "a b"),
+        ("proc ::namespace::TargetFunc {args} {", "args"),
+        ("proc TargetFunc {{a 1} b} {", "{a 1} b"),
+    ],
+    "invalid": [
+        "TargetFunc a b",
+        "if {$a == $b} {",
+    ],
+    "pathological": [
+        ("proc \n ::namespace::TargetFunc \n { \n a \n b \n } \n {", " \n a \n b \n "),
+        ("proc TargetFunc \n { \n {a 1} \n {b 2} \n } \n {", " \n {a 1} \n {b 2} \n "),
+        ("proc   TargetFunc   {   a   b   }   {", "   a   b   "),
+    ],
+}
+
+CLASS_CASES: dict[str, Any] = {
+    "valid": [
+        ("oo::class create TargetClass {", "TargetClass"),
+        ("snit::type TargetClass {", "TargetClass"),
+        ("itcl::class TargetClass {", "TargetClass"),
+    ],
+    "invalid": ["set TargetClass", "if {$TargetClass}", "TargetClass create foo"],
+    "pathological": [
+        ("oo::class \t create \t TargetClass \t {", "TargetClass"),
+        ("oo::class \n create \n TargetClass \n {", "TargetClass"),
+        ("snit::type \n TargetClass \n {", "TargetClass"),
+    ],
+}
+
+DEPENDENCY_CASES: dict[str, Any] = {
+    "valid": [
+        ("package require TargetPkg", "TargetPkg"),
+        ("source TargetPkg.tcl", "TargetPkg.tcl"),
+        ("load TargetPkg.so", "TargetPkg.so"),
+        ("package require -exact TargetPkg 1.0", "TargetPkg"),
+        ('source "TargetPkg.tcl"', "TargetPkg.tcl"),
+    ],
+    "invalid": [
+        "puts TargetPkg",
+        "set package TargetPkg",
+        'puts "package require TargetPkg"',
+    ],
+    "pathological": [
+        ("package   require   TargetPkg", "TargetPkg"),
+        ("source   TargetPkg.tcl", "TargetPkg.tcl"),
+        ("package \t require \t TargetPkg", "TargetPkg"),
+    ],
+}
+
+
+class TestTclExtraction:
+    # -------------------------------------------------------------------------
+    # func_start
+    # -------------------------------------------------------------------------
+    @pytest.mark.parametrize("payload,expected", FUNCTION_CASES["valid"])
+    def test_func_start_valid(self, payload, expected):
+        assert_valid_match(TCL_RULES["func_start"], payload, expected, "tcl")
+
+    @pytest.mark.parametrize("payload", FUNCTION_CASES["invalid"])
+    def test_func_start_invalid(self, payload):
+        assert_invalid_no_match(TCL_RULES["func_start"], payload, "tcl")
+
+    @pytest.mark.parametrize("payload,expected", FUNCTION_CASES["pathological"])
+    def test_func_start_pathological(self, payload, expected):
+        assert_pathological_match(TCL_RULES["func_start"], payload, expected, "tcl")
+
+    # -------------------------------------------------------------------------
+    # args
+    # -------------------------------------------------------------------------
+    @pytest.mark.parametrize("payload,expected", ARGS_CASES["valid"])
+    def test_args_valid(self, payload, expected):
+        assert_valid_match(TCL_RULES["args"], payload, expected, "tcl")
+
+    @pytest.mark.parametrize("payload", ARGS_CASES["invalid"])
+    def test_args_invalid(self, payload):
+        assert_invalid_no_match(TCL_RULES["args"], payload, "tcl")
+
+    @pytest.mark.parametrize("payload,expected", ARGS_CASES["pathological"])
+    def test_args_pathological(self, payload, expected):
+        assert_pathological_match(TCL_RULES["args"], payload, expected, "tcl")
+
+    # -------------------------------------------------------------------------
+    # class_start
+    # -------------------------------------------------------------------------
+    @pytest.mark.parametrize("payload,expected", CLASS_CASES["valid"])
+    def test_class_start_valid(self, payload, expected):
+        assert_valid_match(TCL_RULES["class_start"], payload, expected, "tcl")
+
+    @pytest.mark.parametrize("payload", CLASS_CASES["invalid"])
+    def test_class_start_invalid(self, payload):
+        assert_invalid_no_match(TCL_RULES["class_start"], payload, "tcl")
+
+    @pytest.mark.parametrize("payload,expected", CLASS_CASES["pathological"])
+    def test_class_start_pathological(self, payload, expected):
+        assert_pathological_match(TCL_RULES["class_start"], payload, expected, "tcl")
+
+    # -------------------------------------------------------------------------
+    # _dependency_capture
+    # -------------------------------------------------------------------------
+    @pytest.mark.parametrize("payload,expected", DEPENDENCY_CASES["valid"])
+    def test_dependency_valid(self, payload, expected):
+        assert_valid_dependency_match(TCL_RULES["_dependency_capture"], payload, expected, "tcl")
+
+    @pytest.mark.parametrize("payload", DEPENDENCY_CASES["invalid"])
+    def test_dependency_invalid(self, payload):
+        assert_invalid_no_match(TCL_RULES["_dependency_capture"], payload, "tcl")
+
+    @pytest.mark.parametrize("payload,expected", DEPENDENCY_CASES["pathological"])
+    def test_dependency_pathological(self, payload, expected):
+        assert_pathological_dependency_match(TCL_RULES["_dependency_capture"], payload, expected, "tcl")
diff --git a/tests/extraction/test_args_extraction_strict.py b/tests/extraction/test_args_extraction_strict.py
index a98d92cc..efe73296 100644
--- a/tests/extraction/test_args_extraction_strict.py
+++ b/tests/extraction/test_args_extraction_strict.py
@@ -70,17 +70,6 @@
             )
         ],
     },
-    "tcl": {
-        "valid": [
-            ("proc TargetFunc {a b} {", "TargetFunc"),
-            ("proc ::namespace::TargetFunc {args} {", "TargetFunc"),
-        ],
-        "invalid": ["TargetFunc a b", "if {$a == $b} {"],
-        "pathological": [
-            # Vertical Tcl procs
-            ("proc \n ::namespace::TargetFunc \n { \n a \n b \n } \n {", "TargetFunc")
-        ],
-    },
     "scheme": {
         "valid": [
             ("(define (TargetFunc a b)", "TargetFunc"),
diff --git a/tests/extraction/test_function_extraction_strict.py b/tests/extraction/test_function_extraction_strict.py
index cbcb4ec7..a8cd6a02 100644
--- a/tests/extraction/test_function_extraction_strict.py
+++ b/tests/extraction/test_function_extraction_strict.py
@@ -179,11 +179,6 @@
         "invalid": ["<div id='script'>", "<span class='style'>"],
         "pathological": [("<script \n >", "script")],
     },
-    "tcl": {
-        "valid": [("proc TargetFunc {", "TargetFunc")],
-        "invalid": ["set TargetFunc", "if {$TargetFunc}"],
-        "pathological": [("proc \t TargetFunc \t {", "TargetFunc")],
-    },
 }