Add /ask-minimax-with-context skill

Walks CONTEXT.md and CLAUDE.md files from a given folder up to the git
root, assembles them into a context bundle via shell redirects (file
contents never enter the calling session), then delegates a one-line
question to MiniMax M2.7. Token cost to the main session: paths only.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

memory/skill-ask-minimax-with-context.md

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+# Skill: ask-minimax-with-context
+
+## Purpose
+
+Delegate a focused question to MiniMax M2.7 with automatically gathered project context, without loading any file contents into the current session.
+
+## Usage
+
+```
+/ask-minimax-with-context <folder-path> <question>
+```
+
+Example: `/ask-minimax-with-context octopus/staging/ Has build 1.4.202 been deployed?`
+
+## How It Works
+
+1. Parses args: first token = folder path, rest = question
+2. Walks from the given folder up to the git root collecting `CONTEXT.md` and `CLAUDE.md` at each level (deepest-first)
+3. Assembles a context bundle at `/tmp/ask-minimax-ctx-<TS>.md` via shell redirects — file contents never enter the calling session's context
+4. Writes a prompt file telling MiniMax to read the bundle and answer the question
+5. Runs `ask-minimax-run` (MiniMax M2.7, read+write tools only)
+6. Reads the result file and summarises concisely
+7. Cleans up temp files (keeps result file)
+
+## When to Use
+
+- Any question where the answer lives in CONTEXT.md or CLAUDE.md files in a project tree
+- Even simple questions — overhead is one line from the user, context savings are real
+- Alternative to loading large context hierarchies into the main session just to answer a single question
+
+## Gotchas
+
+- Path must resolve to a directory that is inside a git repo (used to find the walk ceiling)
+- If no CONTEXT.md or CLAUDE.md files are found, the skill warns and asks whether to proceed with the question only
+- Requires the MiniMax profile at `~/.claude-oreillyit-minimax/provider.env`