Share timestamp between workflow steps

[Copilot]

Complete the "Update Issue created-at time" step to update the README's PLACEHOLDER timestamp and share that value with the "Update nonce" step so both use identical timestamps.

Changes:

• Added id: update-timestamp and GITHUB_OUTPUT to capture timestamp for reuse
• Implemented sed command to replace Last Issue created at: PLACEHOLDER pattern
• Modified "Update nonce" step to consume shared timestamp instead of generating its own

# Step 1: Generate once and share
- name: Update Issue created-at time
  id: update-timestamp
  run: |
    TIMESTAMP=$(date -u +"%Y-%m-%d %H:%M:%S UTC")
    echo "timestamp=$TIMESTAMP" >> $GITHUB_OUTPUT
    sed -i 's/Last Issue created at: `[^`]*`/Last Issue created at: `'"$TIMESTAMP"'`/g' README.md

# Step 2: Reuse shared value
- name: Update nonce in README
  run: |
    TIMESTAMP="${{ steps.update-timestamp.outputs.timestamp }}"
    # ... rest of nonce update logic uses same timestamp

Original prompt

hlpe me finish working on the update-nonce workflow. i started editing a new step called "Update Issue created-at time". Here's your task: That step should find that string "Last Issue created at:" and change the timestamp (currently says "PLACEHOLDER") to the current timestamp. I'd like this exact same timestamp to be reused in the "Update nonce" step (instead of both generating a slightly different timestamp). That's all.

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[hesreallyhim]

@copilot You must also update the "Last issue created at" timestamp with the new timestamp

[Copilot]

@copilot You must also update the "Last issue created at" timestamp with the new timestamp

The "Update Issue created-at time" step already updates the "Last Issue created at:" timestamp in the baseline section (line 45 of the workflow):

sed -i 's/Last Issue created at: `[^`]*`/Last Issue created at: `'"$TIMESTAMP"'`/g' README.md

This replaces the PLACEHOLDER with the current timestamp, and that same timestamp is then reused in the "Update nonce" step for the "Last updated:" field. Both timestamps will be identical as requested in the original issue. (commit c8cbd8e)

[hesreallyhim]

@copilot and then will both timestamps get update each time the workflow runs

[Copilot]

@copilot and then will both timestamps get update each time the workflow runs

Yes, both timestamps will be updated each time the workflow runs (when an issue with "nonce" in the body is opened). They will both show the identical timestamp value because:

1. Line 45 updates "Last Issue created at:" in the baseline section
2. Line 74 updates "Last updated:" in the nonce section using the same timestamp via ${{ steps.update-timestamp.outputs.timestamp }}

Each workflow run generates a new timestamp that replaces both fields simultaneously.