feat(plugin): a directory says which project it belongs to, git repo or not (#4085)

All six hooks scoped their requests one way: `git remote get-url origin`,
resolved server-side through the repo bindings. That key does not exist
outside a git repo, so a session in a plain directory was unscoped in every
hook at once — no project context, no prior-art scoping, no project rules —
and silently, because a missing remote is indistinguishable from a remote
nobody bound.

A `.scribe` file is the second key, read by the shared scribe_scope_query so a
directory scopes the same way everywhere:

    {"instance": "https://scribe.example.com", "project_id": 2, "project": "…"}

`instance` is why the file is not just a number: an id is a different project
on every Scribe, so a marker that travels — a copied directory, a shared
machine, a repo someone else clones — would otherwise scope the session to the
wrong project without a word. Compared host-only, and a mismatch drops the id:
no project beats the wrong project. A bare integer is accepted too, since it
is what a person writes by hand. The marker beats a git remote — someone put
the file there on purpose — which is also how a directory overrides its
binding.

Two things it found on the way:

  * An explicit project_id that did not resolve rendered NO message at all —
    the branch hung off `if project_id` as an `elif`, so a caller holding a
    pointer it believed in got a context that silently omitted the project it
    had asked for. Now reported.
  * The refusal reason was a global set inside a function every caller reads
    through `$( )`. The assignment died with the subshell, leaving the caller
    to read an unset variable under `set -u` — which aborts the hook and costs
    the whole session's SessionStart context, to fetch a warning about a file.
    It comes back through stdout with the id instead, and a test pins it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01821k5B3Ysecp9fNYs92Kuy

plugin/hooks/scribe_after_write.sh

@@ -105,12 +105,9 @@ done <<< "$current"
 [ -n "$changed" ] || exit 0
 
 scribe_config || :   # sets url/token; the call below is guarded on them
-repo=$(git -C "$repo_root" remote get-url origin 2>/dev/null || true)
+scope=$(scribe_scope_query "$repo_root")
 repo_q=""
-if [ -n "$repo" ]; then
-  enc=$(printf '%s' "$repo" | jq -sRr '@uri' 2>/dev/null) || enc=""
-  [ -n "$enc" ] && repo_q="&repo=${enc}"
-fi
+[ -n "$scope" ] && repo_q="&${scope}"
 
 # The dedup channels are the PRE-write hook's files, on purpose (see header).
 state_dir="${TMPDIR:-/tmp}/scribe-priorart"

plugin/hooks/scribe_autoinject.sh

@@ -65,14 +65,11 @@ q=$(printf '%s' "$prompt" | head -c 2000)
 # worth retrieving against were exactly the ones silently dropped. -s slurps.
 q_enc=$(printf '%s' "$q" | jq -sRr '@uri' 2>/dev/null) || exit 0
 
-# Resolve the working repo's remote so the server can scope to the bound project.
+# Scope to this directory's project — a `.scribe` marker, else the git remote.
 repo_dir=${event_cwd:-${CLAUDE_PROJECT_DIR:-$PWD}}
-repo=$(git -C "$repo_dir" remote get-url origin 2>/dev/null || true)
+scope=$(scribe_scope_query "$repo_dir")
 repo_q=""
-if [ -n "$repo" ]; then
-  enc=$(printf '%s' "$repo" | jq -sRr '@uri' 2>/dev/null) || enc=""
-  [ -n "$enc" ] && repo_q="&repo=${enc}"
-fi
+[ -n "$scope" ] && repo_q="&${scope}"
 
 # Per-session dedup: ids already injected this session are skipped.
 state_dir="${TMPDIR:-/tmp}/scribe-autoinject"

plugin/hooks/scribe_defs.sh

@@ -19,6 +19,11 @@
 #   scribe_rules_live FILE     live rule ids from the exclusion ledger,
 #                              comma-joined; entries age out (#3751)
 #   scribe_rules_append FILE   stdin ids -> the ledger, timestamped
+#   scribe_scope_query DIR     `project_id=N` or `repo=<enc>` for DIR — the
+#                              project-scope key EVERY hook sends (#4085).
+#                              Helpers: scribe_marker_file, scribe_url_host,
+#                              scribe_marker_read (id<TAB>why-not),
+#                              scribe_marker_project (the id alone)
 #
 # Sourced, not executed: `. "$(dirname "${BASH_SOURCE[0]}")/scribe_defs.sh"`.
 
@@ -283,3 +288,124 @@ scribe_rules_append() {
   now=$(date +%s 2>/dev/null) || now=0
   awk -v ts="$now" 'NF { print $1 "\t" ts }' >> "$f" 2>/dev/null || true
 }
+
+# ---------------------------------------------------------------------------
+# WHICH PROJECT IS THIS DIRECTORY'S? (#4085)
+#
+# Every hook here scopes its request to a project, and until this existed all
+# six did it the same single way: `git remote get-url origin`, resolved
+# server-side through the repo bindings. That works well inside a bound repo
+# and not at all outside one — a session in a plain directory got no project
+# scope from ANY hook, silently, because the one key the whole chain turns on
+# only exists in a git repo.
+#
+# The second key is a `.scribe` file in the directory (or above it, the way
+# git finds its root), naming the project the work belongs to. It is a
+# POINTER, not a copy: an id and enough to check the id means what it says.
+# Nothing Scribe should be holding goes in it.
+#
+#   {"instance": "https://scribe.example.com", "project_id": 2,
+#    "project": "FabledScribe"}
+#
+#   instance    WHICH Scribe the id belongs to, and the reason this file is
+#               not just a number. A project id means nothing on its own: id 2
+#               is a different project on every instance, so a marker that
+#               travels — a copied directory, a shared machine, a repo someone
+#               else clones — would silently scope a session to the wrong
+#               project. Compared HOST-ONLY against the configured endpoint, so
+#               http/https and a trailing slash don't cause a false mismatch.
+#               A mismatch drops the id: no project beats the wrong project.
+#   project_id  the pointer itself. Required.
+#   project     a human label. NOTHING READS IT. It is there so the file
+#               answers "what is this?" when opened, and so a stale one is
+#               visible rather than inert.
+#
+# A bare integer is also accepted (`echo 2 > .scribe`), because it is what a
+# person writes by hand and it parses as JSON already. It skips the instance
+# check by having nothing to check — deliberate, and the reason the written
+# form carries `instance`.
+#
+# THE MARKER WINS over a git remote. Someone put the file there on purpose;
+# a remote is just where the code happens to be pushed. That also makes the
+# marker the way to override a binding for one directory.
+
+# Nearest `.scribe` at or above DIR. Walks up to the filesystem root, capped so
+# a pathological path cannot spin.
+scribe_marker_file() {
+  local dir="$1" depth=0
+  [ -n "$dir" ] || return 0
+  while [ "$depth" -lt 40 ]; do
+    [ -f "$dir/.scribe" ] && { printf '%s' "$dir/.scribe"; return 0; }
+    case "$dir" in ""|"/") return 0 ;; esac
+    dir=$(dirname -- "$dir" 2>/dev/null) || return 0
+    depth=$((depth + 1))
+  done
+  return 0
+}
+
+# Host of a URL, lowercased, port kept. "" for empty input.
+scribe_url_host() {
+  printf '%s' "${1:-}" \
+    | sed -e 's#^[A-Za-z][A-Za-z0-9+.-]*://##' -e 's#^[^/@]*@##' -e 's#[/?].*$##' \
+    | tr 'A-Z' 'a-z'
+}
+
+# Read a marker file: prints "ID<TAB>REASON", at most one of them non-empty.
+#
+#   "7\t"            use project 7
+#   "\tnames no …"   a file is there and deliberately NOT used; say why
+#   "\t"             no marker file at all — the ordinary case, say nothing
+#
+# One line rather than an id plus a global, because every caller reads this
+# through `$( )` and a global set inside a command substitution dies with the
+# subshell. The caller would then read an unset variable, which under the
+# `set -u` these hooks all run with aborts the hook and costs the whole
+# session's context — a failure far larger than the message it was fetching.
+scribe_marker_read() {
+  local f="$1" id inst want
+  [ -n "$f" ] && [ -f "$f" ] || { printf '\t'; return 0; }
+  command -v jq >/dev/null 2>&1 || { printf '\t'; return 0; }
+  # A bare integer is valid JSON, so one filter reads both forms.
+  id=$(jq -r 'if type=="number" then (.|floor|tostring)
+              elif type=="object" then (.project_id // empty | tostring)
+              else empty end' "$f" 2>/dev/null) || id=""
+  case "$id" in ''|*[!0-9]*) id="" ;; esac
+  if [ -z "$id" ] || [ "$id" = "0" ]; then
+    printf '\tnames no project_id'
+    return 0
+  fi
+  inst=$(jq -r 'if type=="object" then (.instance // empty) else empty end' "$f" 2>/dev/null) || inst=""
+  if [ -n "$inst" ]; then
+    want=$(scribe_url_host "${url:-}")
+    inst=$(scribe_url_host "$inst")
+    if [ -n "$want" ] && [ "$inst" != "$want" ]; then
+      printf '\tpoints at %s, but this session is configured for %s' "$inst" "$want"
+      return 0
+    fi
+  fi
+  printf '%s\t' "$id"
+}
+
+# Just the id a marker names, or "" — the half scribe_scope_query needs.
+scribe_marker_project() {
+  scribe_marker_read "$1" | cut -f1
+}
+
+# The query args identifying DIR's project — `project_id=N` or `repo=<enc>` —
+# with NO leading `?` or `&`, so each caller keeps its own separator. Empty
+# when neither key is available. Requires `url` to be set (scribe_config) for
+# the marker's instance check; without it a marker is still honoured, since an
+# unconfigured hook is not going to send the request anyway.
+scribe_scope_query() {
+  local dir="$1" id repo enc
+  id=$(scribe_marker_project "$(scribe_marker_file "$dir")")
+  if [ -n "$id" ]; then
+    printf 'project_id=%s' "$id"
+    return 0
+  fi
+  repo=$(git -C "$dir" remote get-url origin 2>/dev/null || true)
+  [ -n "$repo" ] || return 0
+  command -v jq >/dev/null 2>&1 || return 0
+  enc=$(printf '%s' "$repo" | jq -sRr '@uri' 2>/dev/null) || enc=""
+  [ -n "$enc" ] && printf 'repo=%s' "$enc"
+}

plugin/hooks/scribe_prior_art.sh

@@ -150,13 +150,10 @@ q=$(printf '%s' "$code" | head -c 1200)
 path_enc=$(printf '%s' "$rel_path" | jq -sRr '@uri' 2>/dev/null) || exit 0
 code_enc=$(printf '%s' "$q" | jq -sRr '@uri' 2>/dev/null) || code_enc=""
 
-# Resolve the working repo's remote so the server can scope to the bound project.
-repo=$(git -C "$lookup_dir" remote get-url origin 2>/dev/null || true)
+# Scope to this directory's project — a `.scribe` marker, else the git remote.
+scope=$(scribe_scope_query "$lookup_dir")
 repo_q=""
-if [ -n "$repo" ]; then
-  enc=$(printf '%s' "$repo" | jq -sRr '@uri' 2>/dev/null) || enc=""
-  [ -n "$enc" ] && repo_q="&repo=${enc}"
-fi
+[ -n "$scope" ] && repo_q="&${scope}"
 
 # Per-session dedup, in its own file rather than sharing auto-inject's. Each
 # surface shows a given snippet at most once per session, but they don't silence

plugin/hooks/scribe_report_check.sh

@@ -149,11 +149,8 @@ report() {
     enc=$(printf '%s' "$m" | jq -sRr '@uri' 2>/dev/null) || enc=""
     q="${q}&missing=${enc}"
   fi
-  repo=$(git -C "${event_cwd:-${CLAUDE_PROJECT_DIR:-$PWD}}" remote get-url origin 2>/dev/null || true)
-  if [ -n "$repo" ]; then
-    enc=$(printf '%s' "$repo" | jq -sRr '@uri' 2>/dev/null) || enc=""
-    [ -n "$enc" ] && q="${q}&repo=${enc}"
-  fi
+  scope=$(scribe_scope_query "${event_cwd:-${CLAUDE_PROJECT_DIR:-$PWD}}")
+  [ -n "$scope" ] && q="${q}&${scope}"
   curl -fsS --max-time 4 \
     -H "Authorization: Bearer ${token}" \
     "${url%/}/api/plugin/report-check?${q}" 2>/dev/null

plugin/hooks/scribe_session_context.sh

@@ -151,14 +151,19 @@ scribe_config || :
 dyn=""
 status=""
 if [ -n "$url" ] && [ -n "$token" ] && command -v curl >/dev/null 2>&1; then
-  # Resolve the working repo's remote so the server can map it to a project.
+  # Which project is this directory's? A `.scribe` marker first, then the git
+  # remote (#4085). scribe_scope_query answers that, and is shared with the
+  # other five hooks so a directory scopes the same way everywhere; the pieces
+  # are re-read here only to explain what happened when nothing resolved.
   repo_dir=${CLAUDE_PROJECT_DIR:-$PWD}
+  marker=$(scribe_marker_file "$repo_dir")
+  marker_read=$(scribe_marker_read "$marker")
+  marker_id=${marker_read%%$'\t'*}
+  marker_why=${marker_read#*$'\t'}
   repo=$(git -C "$repo_dir" remote get-url origin 2>/dev/null || true)
+  scope=$(scribe_scope_query "$repo_dir")
   q=""
-  if [ -n "$repo" ]; then
-    enc=$(printf '%s' "$repo" | jq -sRr '@uri' 2>/dev/null) || enc=""
-    [ -n "$enc" ] && q="?repo=${enc}"
-  fi
+  [ -n "$scope" ] && q="?${scope}"
   body=$(curl -fsS --max-time 8 \
     -H "Authorization: Bearer ${token}" \
     "${url%/}/api/plugin/context${q}" 2>/dev/null) || body=""
@@ -184,6 +189,29 @@ fi
 [ -n "$dyn" ]    && append "$dyn"
 [ -n "$status" ] && append "$status"
 
+# --- Nothing resolved: say WHICH nothing, and what would fix it (#4085) ---
+#
+# The server can say "no project is bound to this working directory", and
+# until now that was the whole answer. It is the same sentence for a directory
+# that is not a repo, a repo whose remote nobody bound, and a marker file
+# naming a project this account cannot read — three different problems with
+# three different fixes, and no way to tell them apart from inside the session.
+#
+# The marker is the adapter's convention, so the adapter explains it: the
+# server reports whether a project resolved, and this hook — which knows what
+# it sent and why — turns that into the sentence the operator can act on. The
+# repo case is left to the server's existing "bind this repo" hint.
+if [ -n "$dyn" ] && [ -z "$(printf '%s' "$body" | jq -r '.project.id // empty' 2>/dev/null)" ]; then
+  host=$(scribe_url_host "$url")
+  if [ -n "$marker_why" ]; then
+    append "> ⚠️ Scribe: the marker file \`${marker}\` ${marker_why}, so no project context was loaded. Fix the file, or ignore it and bind this directory another way."
+  elif [ -n "$marker_id" ]; then
+    append "> ⚠️ Scribe: \`${marker}\` names project ${marker_id}, which this account cannot read on ${host} — it may belong to a different Scribe instance, or the project may have been deleted. Check with \`list_projects()\` and correct the file."
+  elif [ -z "$repo" ]; then
+    append "> ℹ️ Scribe: this directory is not a git repository and has no \`.scribe\` marker, so no project context was loaded — every hook this session is unscoped. If this work belongs to a Scribe project, call \`list_projects()\` and write the marker: \`{\"instance\": \"${url%/}\", \"project_id\": <id>, \"project\": \"<title>\"}\` in \`${repo_dir}/.scribe\`. Future sessions here load that project on their own."
+  fi
+fi
+
 # Compaction re-grounding: lead with a reload banner when this fire is a compact.
 if [ "$source" = "compact" ]; then
   prepend "> ⟳ This session was just COMPACTED — earlier turns are now a summary, so in-flight detail may be lost. Any rules that had been retrieved went into that summary with everything else, so treat yourself as holding none: before the next consequential act, ask again with \`search(content_type=\"rule\")\` rather than trusting a half-remembered one. Re-run \`enter_project()\` for the active project, check its recent milestones and open tasks, and reconcile what you are mid-way through against what Scribe records. Scribe is the record."

plugin/hooks/scribe_tool_rules.sh

@@ -63,11 +63,8 @@ tool_enc=$(printf '%s' "$tool_name" | jq -sRr '@uri' 2>/dev/null) || exit 0
 
 repo_q=""
 lookup_dir=${event_cwd:-${CLAUDE_PROJECT_DIR:-$PWD}}
-repo_remote=$(git -C "$lookup_dir" remote get-url origin 2>/dev/null || true)
-if [ -n "$repo_remote" ]; then
-  repo_enc=$(printf '%s' "$repo_remote" | jq -sRr '@uri' 2>/dev/null) || repo_enc=""
-  [ -n "$repo_enc" ] && repo_q="&repo=${repo_enc}"
-fi
+scope=$(scribe_scope_query "$lookup_dir")
+[ -n "$scope" ] && repo_q="&${scope}"
 
 # THE SHARED SESSION LEDGER, and the thing most worth getting right here.
 #