bitcoin-minor-release-skill

name	bitcoin-minor-release-skill
description	Automatically generate minor release notes based on the PRs merged into this branch since the last version.

Bitcoin Core minor release notes

Extract GitHub Pull Request numbers from backport commits and format them for release notes.

Identify Current Release Version

Check CMakeLists.txt to determine what release is being prepared and what BASE_VERSION tag to use.

grep -E "CLIENT_VERSION_(MAJOR|MINOR|BUILD|RC)" CMakeLists.txt | head -4

Example output:

set(CLIENT_VERSION_MAJOR 29)
set(CLIENT_VERSION_MINOR 3)
set(CLIENT_VERSION_BUILD 0)
set(CLIENT_VERSION_RC 1)

This means we're preparing v29.3rc1. The previous release tag to diff from is v29.2.

Determining the BASE_VERSION tag

Find the most recent non-release-candidate tag on the X.x branch:

git tag --list 'vX.*' --sort=-v:refname | grep -v "rc" | head -1

Example for v29.3:

git tag --list 'v29.*' --sort=-v:refname | grep -v "rc" | head -1

This handles cases like:

• Preparing v29.3 → finds v29.2 (or v29.2.1 if a patch release exists)
• Preparing v30.1 → finds v30.0.1 if it exists, otherwise v30.0
• Release candidates use the same BASE_VERSION tag as the final release (e.g. v29.3rc2 and v29.3rc1 should both use v29.2)

Extract PR Numbers

The Github-Pull field in commit messages can use inconsistent formats, so handle all three:

• Github-Pull: #XXXXX
• Github-Pull: XXXXX (no #)
• Github-Pull: bitcoin/bitcoin#XXXXX

Get all unique PR numbers between a tag and HEAD

git log <tag>..HEAD --pretty=format:"%b" | grep -i "github-pull" | sed 's/.*#//' | sed 's/Github-Pull: //' | sort -n | uniq

Example:

git log v29.2..HEAD --pretty=format:"%b" | grep -i "github-pull" | sed 's/.*#//' | sed 's/Github-Pull: //' | sort -n | uniq

View all Github-Pull lines (to debug format issues)

git log <tag>..HEAD --pretty=format:"%b" | grep -i "github-pull" | sort | uniq

Find PRs merged directly to the release branch (not backported from master)

In rare cases, a PR may be merged directly into the X.x branch rather than being backported from master. These appear as merge commits in the subject line and usually don't mention "backport".

git log <tag>..HEAD --oneline | grep "Merge bitcoin/bitcoin#" | grep -iv "backport"

Example:

git log v29.2..HEAD --oneline | grep "Merge bitcoin/bitcoin#" | grep -iv "backport"

Look Up PR Titles from Master

This is much faster than looking them up through github. Merge commits in master use the format: Merge bitcoin/bitcoin#XXXXX: <title>

Search for specific PR numbers

git log master --oneline | grep -E "bitcoin/bitcoin#(PR1|PR2|PR3|...)"

Example:

git log master --oneline | grep -E "bitcoin/bitcoin#(31423|32473|33050|33105)"

Formatting for Release Notes

1. Generate the PR list with titles

Combine the above commands to get a formatted list:

# First, get the PR numbers
prs=$(git log <tag>..HEAD --pretty=format:"%b" | grep -i "github-pull" | sed 's/.*#//' | sed 's/Github-Pull: //' | sort -n | uniq | tr '\n' '|' | sed 's/|$//')

# Then look up titles
git log master --oneline | grep -E "bitcoin/bitcoin#($prs)"

2. Format as markdown table

The output from the merge commit search can be transformed into a markdown table:

PR Number	Title	Backport?
#XXXXX	Description of the change	Yes/No

3. Categorize for release notes

Group PRs by type based on their title prefixes. Default to Misc:

• Validation: validation, consensus
• P2P Network: net, p2p
• Mempool: mempool, tx relay policy, policy, fee est
• Wallet: wallet, wallettool
• Mining: miner, mining
• Build: build, guix, depends
• Tests: test, qa
• Docs: doc, docs
• Misc: ci, contrib

4. Get contributors for credits section

git log --format='- %aN' <tag>..HEAD | grep -v 'merge-script' | sort -fiu

5. Get supported systems

Find the supported systems string from the BASE_VERSION's historical release notes:

grep -A2 "is supported and" doc/release-notes/release-notes-<BASE_VERSION>.md | tail -2 | tr '\n' ' '

Example for v29.3rc1 (BASE_VERSION is v29.2):

grep -A2 "is supported and" doc/release-notes/release-notes-29.2.md | tail -2 | tr '\n' ' '

This extracts the line like Linux Kernel 3.17+, macOS 13+, and Windows 10+.

Release notes format

See release-notes-template.md for the full template structure. Copy it to doc/release-notes.md and fill in:

• Replace <VERSION> with the version number (e.g., 30.1 or 29.3rc1)
• Replace <DIRNAME> with the download directory path:
  • Final releases: bitcoin-core-X.Y/
    • Example: v28.3 → bitcoin-core-28.3/
  • Release candidates: bitcoin-core-X.Y/test.rcN/
    • Example: v29.1rc2 → bitcoin-core-29.1/test.rc2/
• Replace <SUPPORTED_SYSTEMS> with the appropriate string
• Add PR entries under the appropriate category sections
• Fill in the credits section with contributor names