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romanett
0e40e12296
## Summary Adds the **CTT regression** workflow. It runs the OPC UA Compliance Test Tool against the reference server: - every Sunday on master; - manually; - on pull requests a maintainer labels `ctt`. The CTT is member-only software, so the run itself happens in the private repository `OPCFoundation/UA-.NETStandard-CTT`. This workflow does four things: 1. Starts the private run with `workflow_dispatch`, passing the PR head ref and the commit that was labelled. A push after labelling is not run; label again. 2. Waits for the run (about 1.5 hours) and downloads only its public summary: result counts per part and the test cases that changed against the baseline. CTT scripts and logs are never downloaded. 3. Posts the result as the `CTT` commit status, as a PR comment (updated in place) and in the job summary, then removes the label. 4. Feeds a README badge for the weekly master run. The results are a regression signal for this code base, not a certification. The summary says so. ## Security - **Secret access:** `pull_request_target` is used only to get the access secret. The job never checks out or runs PR code; PR data is passed through `env`. - **PR code runs next to the CTT** on the private runner, so it could read the CTT files. Only label a PR after reviewing it. - **Access to the private repository:** a GitHub App installed on that repository only, or a fine-grained token, with Actions read/write. A run takes longer than an App installation token lives (one hour), so the job mints a new installation token for each call. ## Setup needed after merge - [ ] Create a GitHub App, or use an existing one. Permissions: Actions read/write and Metadata read. Install it on `OPCFoundation/UA-.NETStandard-CTT` only. - [ ] Set variable `CTT_APP_ID` and secret `CTT_APP_PRIVATE_KEY` in this repository. Alternatively, set secret `CTT_TOKEN` with a fine-grained token that has the same permissions on the same repository. - [ ] Create the `ctt` label. ## Test plan - [x] Private workflow on GitHub-hosted `windows-latest`. Silent CTT install, server build, generated test PKI and all 23 parts ran in about 83 minutes and matched the local baseline. Remaining differences: Pass→Warning flips from response-timestamp delays, which led to raising Time Tolerance to 250 ms, and one ResendData timing case. - [x] Embedded bash scripts pass `bash -n`; App JWT signing checked against a throwaway RSA key. - [ ] End to end from this repository after merge, once the secret is set: run it manually, then label a PR. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>