FactoryTalk Optix reusable faceplate parameter passing: pass a different PLC tag to each faceplate instance
FactoryTalk Optix reusable faceplate parameter passing: pass a different PLC tag to each faceplate instance
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FactoryTalk Optix reusable faceplate parameter passing: pass a different PLC tag to each faceplate instance
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Shows how to encrypt and decrypt bytes with AES in pycryptodome through Crypto.Cipher.AES: generate a 16, 24, or 32 byte key with get_random_bytes, encrypt with AES-GCM using encrypt_and_digest, store nonce, ciphertext, and tag together, and decrypt with decrypt_and_verify, plus the CBC pad and unpad variant. Use when…
Shows how to render a diff of two Tiptap revisions safely: diff ProseMirror JSON at block level with hard caps, generate HTML with the same extensions so table cell colspan, rowspan and colwidth survive, then sanitize with DOMPurify keeping only allowlisted inline style properties. Use when a revision history view is …
Fixes this failure: require every in-scope component's health check to pass before the agent marks all components operational, list the components still failing in the update. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Fixes this failure: dig into the subdomain's actual senders: compare Postmaster Tools data with the aggregate reports per sending IP. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Fixes marketing sends blocked when a subdomain inherits DMARC p=reject, by publishing an explicit subdomain DMARC record and aligning the platform. Use when a marketing platform sends as a subdomain that has no own DMARC record. Not for root domain corporate mail failures.
Explains why backup verification passes while a real restore fails, and closes the gap with boot, application, and full-chain restore tests. Use when SureBackup, check, or verify jobs are green but production restores break. Not for verification jobs that already report errors.
Fixes DMARC failures for third party senders whose envelope-from domain does not align with the header From, by aligning one of the two identifiers. Use when a vendor passes SPF on its own domain but DMARC still fails. Not for senders with no SPF or DKIM at all.
Fixes BIMI record validation failures when the SVG logo is rejected despite DMARC enforcement, by correcting the SVG profile, the VMC or CMC, and the BIMI DNS record. Use when a BIMI checker fails a brand logo on an enforced domain. Not for domains without DMARC at p=quarantine or p=reject.
Fixes Gmail and receiver rejections with 550 5.7.1 DMARC policy violation for third party senders, by delegating signing or envelope alignment properly. Use when a legitimate third party sends as your domain and is rejected. Not for unauthorised spoofing attempts.
Fixes TypeError Failed to execute fetch on Window Illegal invocation in browsers, caused by extracting, storing, destructuring, or passing native fetch so it runs with the wrong receiver. Shows binding fetch to window or globalThis, wrapping it in an arrow function, and testing with a receiver-enforcing fake. Use when…
github_output is the file each GitHub Actions step uses to pass outputs to later steps: give the producing step an id, append name=value lines to $GITHUB_OUTPUT, and read them back as steps outputs. Covers empty outputs, multiline values, and the removed set-output command. Not for job outputs across jobs (needs outpu…
Fixes DMARC failures where SPF passes but DKIM fails (or neither aligns) by making at least one mechanism both pass and align with the From domain. Not for DMARC policy syntax errors, and not for receivers ignoring DMARC entirely.
How to specify the DSN for pt-online-schema-change's "Cannot connect to MySQL" error: the DSN part syntax, authentication options, and a working command template. Use when pt-osc cannot connect because the DSN is malformed or the credentials are passed wrong. Not for connection failures with a correct DSN (check netwo…
Detects when a deduplicating agent merged tests that were not actually duplicates by diffing their assertions and behavior, not just their names. Use when a suite-shrinking pass leaves fewer tests but weaker coverage. Not for intentional test consolidation that a human reviewed and approved with the assertion mapping …
This skill fixes Tiingo 401 'invalid token' on news API calls. It isolates token validity with a minimal call and regenerates the token when needed.
Fixes 422 responses when filtering GitHub security advisories by CWE: the cwes parameter needs the CWE- prefix on each ID, and not every advisories endpoint accepts the filter. Covers identifying the right endpoint, formatting the filter, and falling back to client-side filtering. Use when the advisories API 422s on c…
Fixes sqlmap reporting no parameters found for testing on an authorized target URL. Use when sqlmap starts but finds no testable surface. Not for parameters sqlmap found but declared non-injectable.
Fixes sysbench 'failed to connect to mysql' by checking credentials, grants, and the network path. Use when sysbench cannot reach MySQL at all. Key trigger: the exact connection failure from sysbench.
Fixes Google OAuth requests that fail with invalid_request because the client_id parameter is missing. Use when Google's OAuth endpoint reports this exact missing-parameter error. Not for invalid or wrong client ids, not for redirect_uri problems, not for non-Google providers.
Fixes mail rejected under a DMARC p=reject policy. Use when receivers bounce or drop your mail because DMARC fails and your published policy says reject, and you need to get legitimate mail authenticating. Not for p=none monitoring, SPF/DKIM setup from scratch, or reputation blocks.
Fixes ScrapingBee HTTP 422 url is required errors. Use when the ScrapingBee API rejects a request saying the url parameter is missing, even though you think you sent it. Not for 401 auth failures, 429 rate limits, or target-site blocks.
Fixes dbt macros that silently render as empty by finding the undefined variable, passing arguments explicitly, and adding a fail-fast guard. Use when a macro produces no output and no error. Not for macros that raise errors, which give you a traceback to follow.
Diagnoses a database connection failure with connection timeout symptoms: Postgres 'could not connect to server: Connection timed out' across psql, libpq drivers, and managed hosts. Use when the client cannot reach the server: fail-fast probing with connect_timeout, layering DNS vs raw TCP vs handshake for network dia…