diff --git a/FINDINGS.md b/FINDINGS.md
index 1358a74..850cb1d 100644
--- a/FINDINGS.md
+++ b/FINDINGS.md
@@ -1,7 +1,7 @@
 # Lofi-12 XT — Findings Library
 
 Living knowledge base for this device. Process/tips live in `RE-PROCESS.md`.
-Per-version firmware notes: `Lofi-12XT_v*/…/reversed.md`; version diff: `rev-diff.md`;
+Per-version structural notes: `docs/firmware/notes-v{1.1.156,1.2.179,1.5.205}.md`; version diff: `rev-diff.md`;
 mod feasibility: `tweakability-report.md`; tool docs: `tools/README.md`.
 Deep dives: `docs/hardware.md`, `docs/bootloader.md`, `docs/firmware-update.md`,
 `docs/firmware/v1.5.205.md`.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..034eb9b
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Dejvino
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index 097def1..024fff8 100644
--- a/README.md
+++ b/README.md
@@ -60,3 +60,8 @@ watch `SYSTEM UPDATE` on the OLED. Keep a stock SD for revert.
 - **No vendor binaries or flash dumps are shipped in this repo** (Sonicware IP).
   Bring your own `.bin` from an official update ZIP; distribute mods as scripts,
   never as full images.
+
+## License
+
+MIT — see `LICENSE`. Covers the code, docs, and photos in this repo (own work
+only); no vendor binaries are shipped.
diff --git a/tools/README.md b/tools/README.md
index d18fe70..333a88f 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -9,8 +9,8 @@ Stdlib-only Python (`tools/`). Verified against v1.1.156 / v1.2.179 / v1.5.205.
 | `lofi_pack.py` | `indir/ out.bin [--checksum HEX]` — rebuild exact-fit image |
 | `lofi_patch_string.py` | Same-length UI string swap (Level-0 mod, addresses stable) |
 | `lofi_xref.py` | Count code/self pointers, list slack zero-gaps, locate string + refs |
-| `lofi_checksum.py` | Quick check: CRC/adler/fletcher/sum/xor over obvious spans |
-| `lofi_checksum_crack.py` | Long-running cracker: Phase A fast hashes + xor-mask detect, Phase B generic CRC param search (1,008 combos, multiprocessed), Phase C seeded CRC32-IEEE brute force 0..2²⁴ (hours) |
+| `lofi_checksum.py` | Quick check: CRC/adler/fletcher/sum/xor over obvious spans (historical) |
+| `lofi_checksum_crack.py` | Long-running cracker (**superseded** — checksum solved; kept for methodology) |
 
 ## Safe first loop (do not flash until checksum is cracked)
 
diff --git a/tools/lofi_checksum_crack.py b/tools/lofi_checksum_crack.py
index 811df88..6ba65dc 100755
--- a/tools/lofi_checksum_crack.py
+++ b/tools/lofi_checksum_crack.py
@@ -1,5 +1,8 @@
 #!/usr/bin/env python3
-"""Long-running checksum cracker for Lofi-12 XT cmtd+0x08.
+"""SUPERSEDED 2026-09-30: checksum solved (see lofi_image.compute_checksum).
+Kept for methodology only — do not run expecting new results.
+
+Long-running checksum cracker for Lofi-12 XT cmtd+0x08.
 
 Strategy: 3 known (image, checksum) pairs let us test each hypothesis fast
 with early exit, plus detect CONSTANT-XOR-masked CRCs (stored = crc ^ mask).
diff --git a/tools/lofi_checksum_phaseD.py b/tools/lofi_checksum_phaseD.py
index 803ab34..fd60209 100755
--- a/tools/lofi_checksum_phaseD.py
+++ b/tools/lofi_checksum_phaseD.py
@@ -1,5 +1,8 @@
 #!/usr/bin/env python3
-"""Phase D checksum cracker: 16-bit/ones-complement/chained/DJB2/Murmur batch.
+"""SUPERSEDED 2026-09-30: checksum solved (see lofi_image.compute_checksum).
+Kept for methodology only — do not run expecting new results.
+
+Phase D checksum cracker: 16-bit/ones-complement/chained/DJB2/Murmur batch.
 
 Covers what Phases A-C did not: every candidate must match ALL 3 builds.
 Stdlib only, read-only on stock .bin files.