docs: add AI declaration

AI-DECLARATION.md

@@ -0,0 +1,21 @@
+---
+version: "0.1.2"
+level: copilot
+processes:
+  design: pair
+  implementation: copilot
+  testing: copilot
+  documentation: copilot
+  review: none
+  deployment: none
+---
+
+This format is based on [AI-DECLARATION.md](https://ai-declaration.md/en/0.1.2).
+
+## Notes
+
+- The Rust port of Paul Uszak's Java ent3000 tests was made with OpenAI's ChatGPT, which provided guidance, debugging help, and inspiration throughout the development process.
+- The scoring was designed together with Anthropic's Claude (Claude Code) and implemented by it. This covers calibrated p-values, the combined score, the survival depth, the calibrator, and the score in the CLI, C and Python bindings. I set the purpose (a health score for a source), chose the method (combined p-value plus QNGmeter-style survival depth) and the calibration approach (empirical), and approved the plan and each step.
+- `src/calibration/table.rs` is not written by hand or by AI. It is generated by `examples/calibrate.rs` from simulated random data.
+- The calibration was checked against fresh random data, up to millions of samples per size (see the Accuracy section of the readme). The raw p-values of all tests still match the Java original on the three test files.
+- No AI was used for code review or deployment.

readme.md

@@ -1,3 +1,5 @@
+[![AI-DECLARATION: copilot](https://img.shields.io/badge/䷼%20AI--DECLARATION-copilot-fee2e2?labelColor=fee2e2)](https://ai-declaration.md)
+
 ```
                                 ____                        
                            |\   ` //  /\\   /\\   /\\       
@@ -312,7 +314,3 @@ 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.
 ```
-
-## Credits
-
-This work was made possible with the invaluable assistance of OpenAI's ChatGPT, which provided guidance, debugging help, and inspiration throughout the development process.