fix: resolve the issue store path independently of the working directory

ISSUE_ROOT was the relative `tmp/issues`, so "the store" was whatever
directory the shell happened to be standing in. It is the --out default
in all eight scripts of both layers, which made one `cd` — and a `cd`
outlives the command that ran it — enough for readers to report an empty
store on a full one and for writers to quietly build a second store
beside the first. `issue_index.py` run from inside tmp/issues left
tmp/issues/tmp/issues/ behind and exited 0.

The anchor is issue.py's own __file__, not cwd. A script's location is a
fact about the installation; cwd is a fact about the last `cd`, and the
scripts are invoked by path from wherever the agent happens to be. From
there `store_root()` walks up to the nearest repo marker — `.git`
(exists(), not isdir(): a worktree's .git is a file) or AGENTS.md for a
copy taken out of git — and joins tmp/issues. Markers rather than a
fixed number of `..` hops, because the layout is not a promise. cwd is
tried only if the scripts are not inside a repository at all.

The function lives in the domain layer and skills/sync imports it, so
both layers agree by construction — the direction the layering rule
allows. skills/issue stays stdlib-only.

An explicit --out still wins and is used exactly as typed: a relative
--out stays relative to cwd, because that is what the operator asked
for. No new environment surface.

Two consequences the issue also asked for:

- Missing is no longer reported as empty. `store_error()` returns one
  message for a path that is not there and another for a store with no
  issues in it.
- Nothing conjures a store as a side effect of a write. save() and
  issue_index.build() require it instead of os.makedirs'ing it; only
  issue_new.py and pull.py create one, and both say so on stderr.

Establishes tests/ — plain stdlib unittest, no pytest, no dependencies.
The store tests build a throwaway repo in a TemporaryDirectory (a .git
marker, a copy of both script layers, fixture issues) and run the real
scripts inside it as subprocesses from five different working
directories; tmp/issues/ is never touched. Against the pre-fix scripts
15 of the 21 fail, reproducing the report exactly — five stray stores,
including tmp/issues/tmp/issues.

    python3 -m unittest discover -s tests -v

Closes claude-skills/tea#15

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

skills/issue/SKILL.md

@@ -47,6 +47,24 @@ tmp/issues/wire-sqlc.comments.md    comment thread (written by /tea:sync only)
 tmp/issues/tree-<id>.md             saved graph (issue_tree.py --write)
 ```
 
+## Where the store is
+
+`<repo root>/tmp/issues` — **not** `tmp/issues` relative to wherever you are
+standing. The scripts resolve it by walking up from their own file to the
+nearest `.git` or `AGENTS.md`, so they all see one store no matter which
+directory you run them from, and a `cd` earlier in the session changes nothing.
+
+`--out` overrides that and is taken **literally**: an absolute path is used as
+given, a relative one stays relative to the current directory. Nothing rewrites
+what you typed.
+
+Two things follow, and both are deliberate:
+
+- A store that is not there reports `does not exist`; a store with no issues in
+  it reports `is empty`. They are different problems.
+- No script conjures a store as a side effect of writing. Only `issue_new.py`
+  creates one — the first issue in a fresh checkout — and it says so on stderr.
+
 ## Reading: grep, don't parse
 
 Metadata is one field per line with inline lists precisely so plain `grep`

skills/issue/scripts/issue.py

@@ -48,7 +48,67 @@ without a parser:
 import os
 import re
 
-ISSUE_ROOT = os.path.join("tmp", "issues")
+# --------------------------------------------------------------------------
+# where the store lives
+# --------------------------------------------------------------------------
+# `<repo root>/tmp/issues`, absolute, resolved once at import.
+#
+# It used to be the relative `tmp/issues`, which made "the store" whatever
+# directory the shell happened to be standing in. One `cd` — and a `cd` outlives
+# the command that ran it — was enough for readers to report an empty store on a
+# full one and for writers to quietly build a second store beside the first.
+#
+# The anchor is THIS FILE, not the working directory. A script's own location is
+# a fact about the installation; cwd is a fact about the last `cd`. Walking up
+# from __file__ therefore hands every script in both layers the same answer no
+# matter where it is invoked from — including from inside tmp/issues itself.
+#
+# An explicit --out still wins over all of this, and is used exactly as typed: a
+# relative --out stays relative to cwd, because that is what the operator asked
+# for. There is no environment override; the store is where the repo is.
+
+STORE_PARTS = ("tmp", "issues")
+
+# `.git` is a directory in a normal clone and a FILE in a worktree — hence
+# exists(), not isdir(). AGENTS.md is the fallback for a plugin copied out of
+# git; the agents-sync hook only ever puts one at a repository root.
+REPO_MARKERS = (".git", "AGENTS.md")
+
+_HERE = os.path.dirname(os.path.abspath(__file__))
+
+
+def repo_root(start):
+    """Nearest ancestor of `start` (inclusive) carrying a repo marker, or None.
+
+    Markers, not a fixed number of `..` hops: how deep this file sits below the
+    root is an implementation detail of the repo layout, and the layout is not
+    a promise."""
+    d = os.path.abspath(start)
+    while True:
+        if any(os.path.exists(os.path.join(d, m)) for m in REPO_MARKERS):
+            return d
+        parent = os.path.dirname(d)
+        if parent == d:
+            return None
+        d = parent
+
+
+def store_root(start=None):
+    """Absolute path of the issue store.
+
+    `start` overrides the anchor and exists so the resolution can be exercised
+    against a scratch tree. When these scripts are not inside a repository at
+    all, cwd gets a turn; failing that the historical cwd-relative location
+    stands, made absolute so an error message can name the directory it really
+    looked in."""
+    for anchor in ([start] if start is not None else [_HERE, os.getcwd()]):
+        root = repo_root(anchor)
+        if root:
+            return os.path.join(root, *STORE_PARTS)
+    return os.path.abspath(os.path.join(*STORE_PARTS))
+
+
+ISSUE_ROOT = store_root()
 
 # Domain-owned metadata, in render order. Foreign keys render after these,
 # sorted, so the sync layer can add fields without touching this list.
@@ -356,6 +416,55 @@ def validate(issue, known_ids=None):
 # store
 # --------------------------------------------------------------------------
 
+class StoreMissing(Exception):
+    """The store directory is not there.
+
+    Deliberately a different answer from "the store is empty". One is a path
+    that does not exist, the other is a repository with no issues filed yet, and
+    conflating the two is exactly what made a missed directory look like an
+    empty backlog."""
+
+    def __init__(self, root):
+        self.root = root
+        Exception.__init__(self, "store %s does not exist" % root)
+
+
+def store_exists(root):
+    return os.path.isdir(root)
+
+
+def require_store(root):
+    """Assert the store is there before reading or writing it."""
+    if not os.path.isdir(root):
+        raise StoreMissing(root)
+    return root
+
+
+def create_store(root):
+    """Create the store; True when it actually made the directory.
+
+    Only the commands that legitimately bootstrap a store call this — issue_new
+    and pull — and both announce it. Nothing creates a store as a side effect of
+    a write any more: a missing directory is something to report, not something
+    to conjure."""
+    if os.path.isdir(root):
+        return False
+    os.makedirs(root)
+    return True
+
+
+def store_error(root):
+    """Why `root` cannot be read as a store, or None when it holds issues.
+
+    The two messages are distinct on purpose — see StoreMissing."""
+    if not os.path.isdir(root):
+        return ("store %s does not exist — nothing was created; pass --out to "
+                "point elsewhere" % root)
+    if not all_ids(root):
+        return "store %s exists but is empty" % root
+    return None
+
+
 def path_of(root, id):
     return os.path.join(root, "%s.md" % id)
 
@@ -377,7 +486,7 @@ def load_all(root):
 
 
 def save(root, issue):
-    os.makedirs(root, exist_ok=True)
+    require_store(root)
     p = path_of(root, issue.id)
     with open(p, "w") as f:
         f.write(issue.to_text())

skills/issue/scripts/issue_check.py

@@ -26,16 +26,19 @@ def main():
     ap.add_argument("ids", nargs="*", help="ids to check (default: all)")
     ap.add_argument("--quiet", action="store_true", help="exit code only")
     ap.add_argument("--strict", action="store_true", help="treat warnings as errors")
-    ap.add_argument("--out", default=issue.ISSUE_ROOT, help="store root (default: tmp/issues)")
+    ap.add_argument("--out", default=issue.ISSUE_ROOT,
+                    help="store root (default: <repo>/tmp/issues)")
     args = ap.parse_args()
 
+    problem = issue.store_error(args.out)
+    if problem:
+        sys.exit("issue_check.py: %s" % problem)
+
     issues = issue.load_all(args.out)
     ids = args.ids or sorted(issues)
     for i in ids:
         if i not in issues:
             sys.exit("issue_check.py: no issue %r in %s" % (i, args.out))
-    if not ids:
-        sys.exit("issue_check.py: store %s is empty" % args.out)
 
     known = set(issues)
     bad = 0

skills/issue/scripts/issue_index.py

@@ -7,8 +7,12 @@ the index acknowledges that a tracker exists: `local` means the issue has never
 left this machine, `gitea` means the sync layer has pushed or pulled it. Both
 are ordinary issues here.
 
+The store is <repo root>/tmp/issues unless --out says otherwise; an existing
+store with nothing in it gets an "_empty_" table, a store that is not there is
+an error rather than a directory to create.
+
 Usage:
-    issue_index.py [--out tmp/issues]
+    issue_index.py [--out DIR]
 """
 import argparse
 import os
@@ -27,6 +31,9 @@ def cell(v):
 
 
 def build(root):
+    # An index of a store that is not there is not an empty index, it is a bad
+    # path. Raising beats writing INDEX.md into a directory nobody asked for.
+    issue.require_store(root)
     issues = issue.load_all(root)
     rows = []
     for i in sorted(issues):
@@ -71,7 +78,6 @@ def build(root):
 
     out.append("")
     path = os.path.join(root, "INDEX.md")
-    os.makedirs(root, exist_ok=True)
     with open(path, "w") as f:
         f.write("\n".join(out))
     return path, len(rows)
@@ -79,9 +85,16 @@ def build(root):
 
 def main():
     ap = argparse.ArgumentParser(description="Rebuild the local issue index (offline)")
-    ap.add_argument("--out", default=issue.ISSUE_ROOT, help="store root (default: tmp/issues)")
+    ap.add_argument("--out", default=issue.ISSUE_ROOT,
+                    help="store root (default: <repo>/tmp/issues)")
     args = ap.parse_args()
-    path, n = build(args.out)
+    # An existing store with nothing in it is a legitimate thing to index — it
+    # gets an "_empty_" table. A store that is not there is not.
+    try:
+        path, n = build(args.out)
+    except issue.StoreMissing as e:
+        sys.exit("issue_index.py: %s — nothing was created; create an issue with "
+                 "issue_new.py, or pass --out" % e)
     print("%s — %d issue(s)" % (path, n))
 
 

skills/issue/scripts/issue_new.py

@@ -151,7 +151,8 @@ def main():
     ap.add_argument("--assignee", action="append", default=[], help="assignee; repeat")
     ap.add_argument("--depends", action="append", default=[],
                     help="id this issue depends on; repeat")
-    ap.add_argument("--out", default=issue.ISSUE_ROOT, help="store root (default: tmp/issues)")
+    ap.add_argument("--out", default=issue.ISSUE_ROOT,
+                    help="store root (default: <repo>/tmp/issues)")
     args = ap.parse_args()
 
     labels = ["type/%s" % args.type]
@@ -177,6 +178,11 @@ def main():
         labels=labels, assignees=args.assignee, milestone=args.milestone,
         depends=args.depends)
 
+    # The first issue in a fresh checkout has to create the store, but it says
+    # so — and it says where, because the path is absolute.
+    if issue.create_store(args.out):
+        sys.stderr.write("created store %s\n" % os.path.abspath(args.out))
+
     path = issue.save(args.out, iss)
     issue_index.build(args.out)
     print("%s  [type/%s] %s" % (path, args.type, args.title))

skills/issue/scripts/issue_tree.py

@@ -66,12 +66,15 @@ def main():
     ap.add_argument("--depth", type=int, default=6, help="max depth (default: 6)")
     ap.add_argument("--write", action="store_true",
                     help="also write tmp/issues/tree-<slug>.md")
-    ap.add_argument("--out", default=issue.ISSUE_ROOT, help="store root (default: tmp/issues)")
+    ap.add_argument("--out", default=issue.ISSUE_ROOT,
+                    help="store root (default: <repo>/tmp/issues)")
     args = ap.parse_args()
 
+    problem = issue.store_error(args.out)
+    if problem:
+        sys.exit("issue_tree.py: %s" % problem)
+
     issues = issue.load_all(args.out)
-    if not issues:
-        sys.exit("issue_tree.py: store %s is empty" % args.out)
     edges = issue.graph(issues)
 
     roots = args.ids