docs(todo): Archive completed tasks #4b and #10

- Moved the descriptions for tasks #4b (check_all script) and #10 (spectool optimization) to the 'Past Tasks' section in TODO.md.
- This adheres to the rule of archiving completed tasks to keep the 'Next Up' list focused.

1 files changed, 16 insertions, 4 deletions

diff --git a/TODO.md b/TODO.md
index d73b2f3..2df372b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -5,10 +5,20 @@ This file tracks the next set of immediate, actionable tasks for the project.
 ## Next Up
 
 -   **Task #4: Finalize Build System**
-    -   [ ] Implement Linux cross-compilation from macOS.
-    -   [ ] Create `scripts/check_all.sh` to build and test all platform targets (macOS, Windows, Linux) to ensure stability before commits.
--   **Task #10: Optimize Spectrogram Assets**
-    -   [ ] Modify `spectool` to trim leading and trailing silent frames from `.spec` files to reduce asset size.
+    -   [ ] 4a. Implement Linux cross-compilation from macOS.
+-   **Task #8: Implement Final Build Stripping**
+    - [ ] Define and document a consistent set of rules for code stripping under the `STRIP_ALL` macro.
+    - [ ] Example sub-tasks: remove unused functions, strip debug fields from structs, simplify code paths where possible.
+
+## Future Goals
+
+-   **Task #5: Implement Spectrogram Editor**
+    - [ ] Develop a web-based tool (`tools/editor`) for creating and editing `.spec` files visually.
+    - [ ] The tool should support generating `.spec` files from elementary shapes (lines, curves) for extreme compression.
+-   **Phase 2: Advanced Size Optimization**
+    - [ ] Replace GLFW with a minimal native Windows API layer.
+    - [ ] Investigate and implement advanced asset compression techniques (e.g., logarithmic frequency, quantization).
+    - [ ] Explore replacing the standard C/C++ runtime with a more lightweight alternative.
 
 ## Past Tasks
 
@@ -16,3 +26,5 @@ This file tracks the next set of immediate, actionable tasks for the project.
 -   Vertically compact C++ source code.
 -   Create top-level `README.md`.
 -   Move non-essential documentation to `doc/`.
+-   **Task #4b:** Create `scripts/check_all.sh` to build and test all platform targets (macOS, Windows, Linux) to ensure stability before commits.
+-   **Task #10:** Modify `spectool` to trim leading and trailing silent frames from `.spec` files to reduce asset size.
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