diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index fcd5400..cae91b9 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -7,7 +7,7 @@ on:
   pull_request:
     branches: [main, master]
   schedule:
-    - cron: '0 6 * * 1'
+    - cron: '0 6 * * 1'   # weekly Monday 06:00 UTC
 
 # Estate guardrail: cancel superseded runs so re-pushes / rebased PR
 # updates do not pile up queued runs against the shared account-wide
diff --git a/.mise.toml b/.mise.toml
new file mode 100644
index 0000000..5b59868
--- /dev/null
+++ b/.mise.toml
@@ -0,0 +1,16 @@
+[tools]
+# = "Docudactyl HPC — Pinned tool versions (mise)"
+# = "These versions are tested and known to work with the current codebase."
+# = "Upgrading any of these requires testing:"
+# = "- Zig: build.zig API changes (0.14→0.15 broke addSharedLibrary)"
+# = "- Idris2: ABI proof syntax may change"
+# = "- OCaml: dune build compatibility"
+# = "- Julia: legacy component only"
+# = "Chapel is NOT managed by mise —"
+# = "Current tested version: 2.7.0"
+# = "SPDX-License-Identifier: MPL-2.0"
+zig = "0.15.2"
+idris2 = "0.8.0"
+ocaml = "5.4.1"
+julia = "1.12.5"
+just = "1.46.0"
diff --git a/.tool-versions b/.tool-versions
deleted file mode 100644
index 3ea1cef..0000000
--- a/.tool-versions
+++ /dev/null
@@ -1,19 +0,0 @@
-# Docudactyl HPC — Pinned tool versions (asdf)
-#
-# These versions are tested and known to work with the current codebase.
-# Upgrading any of these requires testing:
-#   - Zig: build.zig API changes (0.14→0.15 broke addSharedLibrary)
-#   - Idris2: ABI proof syntax may change
-#   - OCaml: dune build compatibility
-#   - Julia: legacy component only
-#
-# Chapel is NOT managed by asdf — it's system-installed via rpm.
-# Current tested version: 2.7.0
-#
-# SPDX-License-Identifier: MPL-2.0
-
-zig 0.15.2
-idris2 0.8.0
-ocaml 5.4.1
-julia 1.12.5
-just 1.46.0
diff --git a/Justfile b/Justfile
index d27801e..f6767f9 100644
--- a/Justfile
+++ b/Justfile
@@ -470,15 +470,14 @@ toolbox := env("DOCUDACTYL_TOOLBOX", "fedora-toolbox-43")
 # Build the Zig FFI shared/static libraries
 build-ffi:
     @echo "Building Zig FFI (poppler, tesseract, ffmpeg, libxml2, gdal, vips)..."
-    toolbox run -c {{toolbox}} bash -c 'export PATH="$$HOME/.asdf/shims:$$HOME/.asdf/bin:$$PATH" && cd {{zig_ffi}} && zig build -Doptimize=ReleaseFast'
+    toolbox run -c {{toolbox}} bash -c 'cd {{zig_ffi}} && mise exec -- zig build -Doptimize=ReleaseFast'
 
 # Build Chapel HPC binary (depends on Zig FFI)
 build-chapel: build-ffi
     @echo "Building Chapel HPC engine..."
     @mkdir -p bin
-    toolbox run -c {{toolbox}} bash -c 'export PATH="$$HOME/.asdf/shims:$$HOME/.asdf/bin:$$PATH" && \
-         ABSPATH=$$(cd {{zig_ffi}}/zig-out/lib && pwd) && \
-         chpl {{chapel_src}}/DocudactylHPC.chpl \
+    toolbox run -c {{toolbox}} bash -c 'ABSPATH=$$(cd {{zig_ffi}}/zig-out/lib && pwd) && \
+         mise exec -- chpl {{chapel_src}}/DocudactylHPC.chpl \
               {{chapel_src}}/Config.chpl \
               {{chapel_src}}/ContentType.chpl \
               {{chapel_src}}/FFIBridge.chpl \
@@ -580,13 +579,13 @@ upgrade-manifest input="manifest.txt" output="manifest.ndjson":
 # Run Zig FFI integration tests
 test-ffi:
     @echo "Running Zig FFI tests..."
-    toolbox run -c {{toolbox}} bash -c 'export PATH="$$HOME/.asdf/shims:$$HOME/.asdf/bin:$$PATH" && cd {{zig_ffi}} && zig build test'
+    toolbox run -c {{toolbox}} bash -c 'cd {{zig_ffi}} && mise exec -- zig build test'
 
 # Check Chapel parse validity (metalayer + smoke; --main-module
 # disambiguates the two `proc main()` files)
 check-chapel:
     @echo "Checking Chapel syntax..."
-    toolbox run -c {{toolbox}} bash -c 'export PATH="$$HOME/.asdf/shims:$$HOME/.asdf/bin:$$PATH" && chpl --parse-only --main-module DocudactylHPC {{chapel_src}}/DocudactylHPC.chpl {{chapel_src}}/*.chpl'
+    toolbox run -c {{toolbox}} bash -c 'mise exec -- chpl --parse-only --main-module DocudactylHPC {{chapel_src}}/DocudactylHPC.chpl {{chapel_src}}/*.chpl'
 
 # Decoupled FFI smoke (per docudactyl#29 / echidna#146 pattern).
 # Compiles just smoke.chpl + FFIBridge.chpl — does not pull in the
@@ -594,15 +593,14 @@ check-chapel:
 # metalayer breaks. Build oracle for the FFI ABI alone.
 check-smoke:
     @echo "Parse-checking FFI smoke..."
-    toolbox run -c {{toolbox}} bash -c 'export PATH="$$HOME/.asdf/shims:$$HOME/.asdf/bin:$$PATH" && chpl --no-codegen {{chapel_src}}/smoke.chpl {{chapel_src}}/FFIBridge.chpl'
+    toolbox run -c {{toolbox}} bash -c 'mise exec -- chpl --no-codegen {{chapel_src}}/smoke.chpl {{chapel_src}}/FFIBridge.chpl'
 
 # Build the FFI smoke binary (links against Zig FFI library).
 build-smoke: build-ffi
     @echo "Building FFI smoke binary..."
     @mkdir -p bin
-    toolbox run -c {{toolbox}} bash -c 'export PATH="$$HOME/.asdf/shims:$$HOME/.asdf/bin:$$PATH" && \
-         ABSPATH=$$(cd {{zig_ffi}}/zig-out/lib && pwd) && \
-         chpl {{chapel_src}}/smoke.chpl \
+    toolbox run -c {{toolbox}} bash -c 'ABSPATH=$$(cd {{zig_ffi}}/zig-out/lib && pwd) && \
+         mise exec -- chpl {{chapel_src}}/smoke.chpl \
               {{chapel_src}}/FFIBridge.chpl \
               -o bin/docudactyl-smoke \
               -L{{zig_ffi}}/zig-out/lib -ldocudactyl_ffi \
@@ -644,8 +642,8 @@ deps-check:
     echo ""
     # Check build tools
     echo "--- Build tools ---"
-    ZIG_VER=$(toolbox run -c {{toolbox}} bash -c "export PATH=\$HOME/.asdf/shims:\$HOME/.asdf/bin:\$PATH && zig version 2>/dev/null" || echo "")
-    CHPL_VER=$(toolbox run -c {{toolbox}} bash -c "chpl --version 2>/dev/null | head -1 | grep -oP '[0-9]+\.[0-9]+\.[0-9]+'" || echo "")
+    ZIG_VER=$(toolbox run -c {{toolbox}} bash -c "mise exec -- zig version 2>/dev/null" || echo "")
+    CHPL_VER=$(toolbox run -c {{toolbox}} bash -c "mise exec -- chpl --version 2>/dev/null | head -1 | grep -oP '[0-9]+\.[0-9]+\.[0-9]+'" || echo "")
     [ -n "$ZIG_VER" ]  && echo "  OK       zig $ZIG_VER (need >= 0.15.0)"  || { echo "  MISSING  zig (need >= 0.15.0)"; FAIL=1; }
     [ -n "$CHPL_VER" ] && echo "  OK       chpl $CHPL_VER (need >= 2.7.0)" || { echo "  MISSING  chpl (need >= 2.7.0)"; FAIL=1; }
     echo ""