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feat: V1 upgrade migration — writing-style opt-out prompt

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New migration script following existing v0.15.2.0.sh / v0.16.2.0.sh
pattern. Writes a .writing-style-prompt-pending flag file on first run
post-upgrade. The preamble's migration-prompt block reads the flag and
fires a one-time AskUserQuestion offering the user a choice between
the new default writing style and restoring V0 prose via
\`gstack-config set explain_level terse\`. Idempotent via flag files;
if the user has already set explain_level explicitly, counts as
answered and skips.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-04-18 11:38:16 +08:00
parent 34eb39285d
commit 6c4f72a426
1 changed files with 38 additions and 0 deletions
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gstack-upgrade/migrations/v1.0.0.0.sh
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#!/usr/bin/env bash
# Migration: v1.0.0.0 — V1 writing style prompt
#
# What changed: tier-≥2 skills default to ELI10 writing style (jargon glossed on
# first use, outcome-framed questions, short sentences). Power users who prefer
# the older V0 prose can set `gstack-config set explain_level terse`.
#
# What this does: writes a "pending prompt" flag file. On the first tier-≥2 skill
# invocation after upgrade, the preamble reads the flag and asks the user once
# whether to keep the new default or opt into terse mode. Flag file is deleted
# after the user answers. Idempotent — safe to run multiple times.
#
# Affected: every user on v0.19.x and below who upgrades to v1.x
set -euo pipefail
GSTACK_HOME="${GSTACK_HOME:-$HOME/.gstack}"
PROMPTED_FLAG="$GSTACK_HOME/.writing-style-prompted"
PENDING_FLAG="$GSTACK_HOME/.writing-style-prompt-pending"
mkdir -p "$GSTACK_HOME"
# If the user has already answered the prompt at any point, skip.
if [ -f "$PROMPTED_FLAG" ]; then
exit 0
fi
# If the user has already explicitly set explain_level (either way), count that
# as an answer — they've made their choice, don't ask again.
EXPLAIN_LEVEL_SET="$("${HOME}/.claude/skills/gstack/bin/gstack-config" get explain_level 2>/dev/null || true)"
if [ -n "$EXPLAIN_LEVEL_SET" ]; then
touch "$PROMPTED_FLAG"
exit 0
fi
# Write the pending flag — preamble will see it on the first tier-≥2 skill invocation.
touch "$PENDING_FLAG"
echo " [v1.0.0.0] V1 writing style: you'll see a one-time prompt on your next skill run asking if you want the new default (glossed jargon, outcome framing) or the older terse prose."