Merge pull request #11486 from omacom/fix-remote-neovim-yanks

Migrate remote Neovim providers to reliable clipboard yanks and paste

test/shell.d/fixtures/neovim-clipboard/initial-fix.lua

@@ -0,0 +1,102 @@
+-- Clipboard for sessions whose yanks may need to reach another machine:
+-- every copy is emitted as OSC 52 (inside tmux this becomes a tmux buffer,
+-- rebroadcast to every attached client, local or SSH). Paste prefers the
+-- local Wayland clipboard when one is available, so content copied in other
+-- apps remains pasteable; without a display, paste is an OSC 52 query that
+-- tmux (or the terminal) answers.
+local M = {}
+
+local function proc_lines(pid, file)
+  local ok, lines = pcall(vim.fn.readfile, "/proc/" .. pid .. "/" .. file)
+  return ok and lines or {}
+end
+
+local function proc_ppid(pid)
+  for _, line in ipairs(proc_lines(pid, "status")) do
+    local ppid = line:match("^PPid:%s+(%d+)")
+    if ppid then
+      return tonumber(ppid)
+    end
+  end
+end
+
+local function ancestor_process_named(name)
+  local pid = vim.fn.getpid()
+
+  for _ = 1, 16 do
+    local ppid = proc_ppid(pid)
+    if not ppid or ppid <= 1 then
+      return false
+    end
+
+    local comm = proc_lines(ppid, "comm")[1] or ""
+    if comm:find(name, 1, true) then
+      return true
+    end
+
+    pid = ppid
+  end
+
+  return false
+end
+
+function M.setup()
+  local in_tmux = vim.env.TMUX ~= nil
+  local in_ssh = vim.env.SSH_TTY ~= nil or vim.env.SSH_CONNECTION ~= nil
+  local in_herdr = vim.env.HERDR_PANE_ID ~= nil or ancestor_process_named("herdr")
+
+  if not (in_tmux or in_ssh or in_herdr) then
+    return
+  end
+
+  local osc52 = require("vim.ui.clipboard.osc52")
+  local has_wayland = vim.env.WAYLAND_DISPLAY ~= nil
+    and vim.fn.executable("wl-copy") == 1
+    and vim.fn.executable("wl-paste") == 1
+
+  local function copy(register)
+    local emit = osc52.copy(register)
+
+    return function(lines)
+      if has_wayland then
+        local cmd = { "wl-copy", "--sensitive", "--type", "text/plain" }
+        if register == "*" then
+          cmd[#cmd + 1] = "--primary"
+        end
+        vim.fn.system(cmd, lines)
+      end
+
+      if vim.g.omarchy_remote_clipboard_osc52 ~= false then
+        emit(lines)
+      end
+    end
+  end
+
+  local function paste(register)
+    if not has_wayland then
+      return osc52.paste(register)
+    end
+
+    return function()
+      local cmd = { "wl-paste", "--no-newline" }
+      if register == "*" then
+        cmd[#cmd + 1] = "--primary"
+      end
+
+      local lines = vim.fn.systemlist(cmd, "", 1)
+      return vim.v.shell_error == 0 and lines or {}
+    end
+  end
+
+  -- LazyVim disables clipboard syncing over SSH; our provider supports it.
+  vim.opt.clipboard = "unnamedplus"
+
+  vim.g.clipboard = {
+    name = "OmarchyRemoteClipboard",
+    copy = { ["+"] = copy("+"), ["*"] = copy("*") },
+    paste = { ["+"] = paste("+"), ["*"] = paste("*") },
+    cache_enabled = 0,
+  }
+end
+
+return M

test/shell.d/fixtures/neovim-clipboard/july.lua

@@ -0,0 +1,99 @@
+-- Clipboard for sessions whose yanks may need to reach another machine:
+-- every copy is emitted as OSC 52 (inside tmux this becomes a tmux buffer,
+-- rebroadcast to every attached client, local or SSH). Paste prefers the
+-- local Wayland clipboard when one is available, so content copied in other
+-- apps remains pasteable; without a display, paste is an OSC 52 query that
+-- tmux (or the terminal) answers.
+local M = {}
+
+local function proc_lines(pid, file)
+  local ok, lines = pcall(vim.fn.readfile, "/proc/" .. pid .. "/" .. file)
+  return ok and lines or {}
+end
+
+local function proc_ppid(pid)
+  for _, line in ipairs(proc_lines(pid, "status")) do
+    local ppid = line:match("^PPid:%s+(%d+)")
+    if ppid then
+      return tonumber(ppid)
+    end
+  end
+end
+
+local function ancestor_process_named(name)
+  local pid = vim.fn.getpid()
+
+  for _ = 1, 16 do
+    local ppid = proc_ppid(pid)
+    if not ppid or ppid <= 1 then
+      return false
+    end
+
+    local comm = proc_lines(ppid, "comm")[1] or ""
+    if comm:find(name, 1, true) then
+      return true
+    end
+
+    pid = ppid
+  end
+
+  return false
+end
+
+function M.setup()
+  local in_tmux = vim.env.TMUX ~= nil
+  local in_ssh = vim.env.SSH_TTY ~= nil or vim.env.SSH_CONNECTION ~= nil
+  local in_herdr = vim.env.HERDR_PANE_ID ~= nil or ancestor_process_named("herdr")
+
+  if not (in_tmux or in_ssh or in_herdr) then
+    return
+  end
+
+  local osc52 = require("vim.ui.clipboard.osc52")
+  local has_wayland = vim.env.WAYLAND_DISPLAY ~= nil
+    and vim.fn.executable("wl-copy") == 1
+    and vim.fn.executable("wl-paste") == 1
+
+  local function copy(register)
+    local emit = osc52.copy(register)
+
+    return function(lines)
+      if has_wayland then
+        local cmd = { "wl-copy", "--sensitive", "--type", "text/plain" }
+        if register == "*" then
+          cmd[#cmd + 1] = "--primary"
+        end
+        vim.fn.system(cmd, lines)
+      end
+
+      if vim.g.omarchy_remote_clipboard_osc52 ~= false then
+        emit(lines)
+      end
+    end
+  end
+
+  local function paste(register)
+    if not has_wayland then
+      return osc52.paste(register)
+    end
+
+    return function()
+      local cmd = { "wl-paste", "--no-newline" }
+      if register == "*" then
+        cmd[#cmd + 1] = "--primary"
+      end
+
+      local lines = vim.fn.systemlist(cmd, "", 1)
+      return vim.v.shell_error == 0 and lines or {}
+    end
+  end
+
+  vim.g.clipboard = {
+    name = "OmarchyRemoteClipboard",
+    copy = { ["+"] = copy("+"), ["*"] = copy("*") },
+    paste = { ["+"] = paste("+"), ["*"] = paste("*") },
+    cache_enabled = 0,
+  }
+end
+
+return M

test/shell.d/fixtures/neovim-clipboard/june.lua

@@ -0,0 +1,275 @@
+local M = {}
+local uv = vim.uv or vim.loop
+
+local function secure_runtime_dir()
+  local uid = uv.getuid()
+  local candidates = {}
+
+  local function add(path)
+    if path and path ~= "" then
+      candidates[#candidates + 1] = path
+    end
+  end
+
+  add(vim.env.XDG_RUNTIME_DIR)
+  if uid then
+    add("/run/user/" .. uid)
+    add("/dev/shm/nvim-remote-clipboard-" .. uid)
+  end
+
+  for _, dir in ipairs(candidates) do
+    if dir:sub(1, 9) == "/dev/shm/" then
+      pcall(vim.fn.mkdir, dir, "p", 448)
+      pcall(vim.fn.setfperm, dir, "rwx------")
+    end
+
+    local stat = uv.fs_stat(dir)
+    if stat and stat.type == "directory" and stat.uid == uid and stat.mode % 512 == 448 then
+      return dir
+    end
+  end
+end
+
+local function wayland_connection(runtime_dir)
+  if vim.fn.executable("wl-copy") ~= 1 or vim.fn.executable("wl-paste") ~= 1 then
+    return nil
+  end
+
+  local function valid_socket(path)
+    local stat = uv.fs_stat(path)
+    return stat and stat.type == "socket"
+  end
+
+  if vim.env.WAYLAND_DISPLAY and vim.env.WAYLAND_DISPLAY ~= "" then
+    local display = vim.env.WAYLAND_DISPLAY
+    local socket_path = display:sub(1, 1) == "/" and display or (runtime_dir .. "/" .. display)
+    if valid_socket(socket_path) then
+      return display
+    end
+  end
+
+  for _, path in ipairs(vim.fn.glob(runtime_dir .. "/wayland-*", false, true)) do
+    local display = vim.fn.fnamemodify(path, ":t")
+    if not display:match("%.lock$") and valid_socket(path) then
+      return display
+    end
+  end
+end
+
+local function write_private_file(path, payload)
+  local tmp_path = path .. "." .. vim.fn.getpid() .. ".tmp"
+
+  vim.fn.writefile({ payload }, tmp_path, "b")
+  vim.fn.setfperm(tmp_path, "rw-------")
+  vim.fn.rename(tmp_path, path)
+  vim.fn.setfperm(path, "rw-------")
+end
+
+local function proc_lines(pid, file)
+  local ok, lines = pcall(vim.fn.readfile, "/proc/" .. pid .. "/" .. file)
+  return ok and lines or {}
+end
+
+local function proc_ppid(pid)
+  for _, line in ipairs(proc_lines(pid, "status")) do
+    local ppid = line:match("^PPid:%s+(%d+)")
+    if ppid then
+      return tonumber(ppid)
+    end
+  end
+end
+
+local function ancestor_process_named(name)
+  local pid = vim.fn.getpid()
+
+  for _ = 1, 16 do
+    local ppid = proc_ppid(pid)
+    if not ppid or ppid <= 1 then
+      return false
+    end
+
+    local comm = proc_lines(ppid, "comm")[1] or ""
+    if comm:find(name, 1, true) then
+      return true
+    end
+
+    pid = ppid
+  end
+
+  return false
+end
+
+local function copy_to_client_clipboard(register, lines)
+  if vim.g.omarchy_remote_clipboard_osc52 == false then
+    return
+  end
+
+  local ok, osc52 = pcall(require, "vim.ui.clipboard.osc52")
+  if ok then
+    pcall(osc52.copy(register), lines)
+  end
+end
+
+function M.setup()
+  local in_tmux = vim.env.TMUX ~= nil
+  local has_display = vim.env.WAYLAND_DISPLAY or vim.env.DISPLAY
+  local in_remote_session = vim.env.SSH_TTY or vim.env.SSH_CONNECTION
+  local in_herdr = vim.env.HERDR_PANE_ID ~= nil or ancestor_process_named("herdr")
+  local needs_remote_clipboard = not in_tmux and (in_herdr or (in_remote_session and not has_display))
+
+  if not needs_remote_clipboard then
+    return
+  end
+
+  local runtime_dir = secure_runtime_dir()
+  if not runtime_dir then
+    return
+  end
+
+  local wayland_display = wayland_connection(runtime_dir)
+  local ttl_seconds = 10 * 60
+
+  local function empty_clipboard()
+    return { {}, "v" }
+  end
+
+  local function read_regtype(path)
+    local stat = uv.fs_stat(path)
+    if not stat or stat.uid ~= uv.getuid() or stat.mode % 512 ~= 384 then
+      return "v"
+    end
+
+    local ok, file_lines = pcall(vim.fn.readfile, path)
+    if not ok or #file_lines == 0 then
+      return "v"
+    end
+
+    local ok_decode, data = pcall(vim.fn.json_decode, table.concat(file_lines, "\n"))
+    if not ok_decode or type(data) ~= "table" then
+      return "v"
+    end
+
+    if type(data.created_at) == "number" and os.time() - data.created_at > ttl_seconds then
+      vim.fn.delete(path)
+      return "v"
+    end
+
+    return type(data.regtype) == "string" and data.regtype or "v"
+  end
+
+  if wayland_display then
+    local regtype_path = runtime_dir .. "/nvim-remote-clipboard-regtype.json"
+    local env = {
+      "env",
+      "XDG_RUNTIME_DIR=" .. runtime_dir,
+      "WAYLAND_DISPLAY=" .. wayland_display,
+    }
+
+    local function write_regtype(regtype)
+      write_private_file(regtype_path, vim.fn.json_encode({
+        regtype = regtype,
+        created_at = os.time(),
+      }))
+    end
+
+    local function copy(register)
+      return function(lines, regtype)
+        write_regtype(regtype)
+
+        local cmd = vim.list_extend(vim.deepcopy(env), {
+          "wl-copy",
+          "--sensitive",
+          "--type",
+          "text/plain",
+        })
+        if register == "*" then
+          cmd[#cmd + 1] = "--primary"
+        end
+
+        vim.fn.system(cmd, lines)
+        copy_to_client_clipboard(register, lines)
+      end
+    end
+
+    local function paste(register)
+      return function()
+        local cmd = vim.list_extend(vim.deepcopy(env), { "wl-paste", "--no-newline" })
+        if register == "*" then
+          cmd[#cmd + 1] = "--primary"
+        end
+
+        local lines = vim.fn.systemlist(cmd, "", 1)
+        if vim.v.shell_error ~= 0 then
+          return empty_clipboard()
+        end
+
+        return { lines, read_regtype(regtype_path) }
+      end
+    end
+
+    vim.g.clipboard = {
+      name = "OmarchyWaylandClipboard",
+      copy = {
+        ["+"] = copy("+"),
+        ["*"] = copy("*"),
+      },
+      paste = {
+        ["+"] = paste("+"),
+        ["*"] = paste("*"),
+      },
+      cache_enabled = 0,
+    }
+  else
+    local clipboard_path = runtime_dir .. "/nvim-remote-clipboard.json"
+
+    local function copy(register)
+      return function(lines, regtype)
+        write_private_file(clipboard_path, vim.fn.json_encode({
+          lines = lines,
+          regtype = regtype,
+          created_at = os.time(),
+        }))
+        copy_to_client_clipboard(register, lines)
+      end
+    end
+
+    local function read_clipboard()
+      local stat = uv.fs_stat(clipboard_path)
+      if not stat or stat.uid ~= uv.getuid() or stat.mode % 512 ~= 384 then
+        return empty_clipboard()
+      end
+
+      local ok, file_lines = pcall(vim.fn.readfile, clipboard_path)
+      if not ok or #file_lines == 0 then
+        return empty_clipboard()
+      end
+
+      local ok_decode, data = pcall(vim.fn.json_decode, table.concat(file_lines, "\n"))
+      if not ok_decode or type(data) ~= "table" or type(data.lines) ~= "table" then
+        return empty_clipboard()
+      end
+
+      if type(data.created_at) == "number" and os.time() - data.created_at > ttl_seconds then
+        vim.fn.delete(clipboard_path)
+        return empty_clipboard()
+      end
+
+      return { data.lines, data.regtype or "v" }
+    end
+
+    vim.g.clipboard = {
+      name = "RemoteRuntimeClipboard",
+      copy = {
+        ["+"] = copy("+"),
+        ["*"] = copy("*"),
+      },
+      paste = {
+        ["+"] = read_clipboard,
+        ["*"] = read_clipboard,
+      },
+      cache_enabled = 0,
+    }
+  end
+end
+
+return M

test/shell.d/fixtures/neovim-clipboard/parity-pr.lua

@@ -0,0 +1,179 @@
+-- Clipboard for sessions whose yanks may need to reach another machine, so that
+-- yanking, deleting and putting behave the same whether Neovim is local, in
+-- tmux, over SSH, or any combination of those. LazyVim empties 'clipboard'
+-- whenever SSH_CONNECTION is set, which leaves a plain `y` in the unnamed
+-- register; this restores 'unnamedplus' and backs it with a provider that has a
+-- fast path in every one of those environments.
+--
+-- Writes go to whichever transports the session has: the local Wayland
+-- clipboard when there is a display, and the terminal on the other end of the
+-- connection via OSC 52 -- emitted by tmux itself where possible, since `tmux
+-- load-buffer -w` keeps the payload out of tmux's own input parser and its size
+-- limit. Reads prefer whichever clipboard the person is actually sitting in
+-- front of, and fall back to the last value this Neovim copied rather than
+-- blocking on an OSC 52 query that most terminals refuse to answer.
+local M = {}
+
+local function proc_lines(pid, file)
+  local ok, lines = pcall(vim.fn.readfile, "/proc/" .. pid .. "/" .. file)
+  return ok and lines or {}
+end
+
+local function proc_ppid(pid)
+  for _, line in ipairs(proc_lines(pid, "status")) do
+    local ppid = line:match("^PPid:%s+(%d+)")
+    if ppid then
+      return tonumber(ppid)
+    end
+  end
+end
+
+local function ancestor_process_named(name)
+  local pid = vim.fn.getpid()
+
+  for _ = 1, 16 do
+    local ppid = proc_ppid(pid)
+    if not ppid or ppid <= 1 then
+      return false
+    end
+
+    local comm = proc_lines(ppid, "comm")[1] or ""
+    if comm:find(name, 1, true) then
+      return true
+    end
+
+    pid = ppid
+  end
+
+  return false
+end
+
+local function empty(lines)
+  return lines == nil or #lines == 0 or (#lines == 1 and lines[1] == "")
+end
+
+function M.setup()
+  local in_tmux = vim.env.TMUX ~= nil
+  local in_ssh = vim.env.SSH_TTY ~= nil or vim.env.SSH_CONNECTION ~= nil
+  local in_herdr = vim.env.HERDR_PANE_ID ~= nil or ancestor_process_named("herdr")
+
+  if not (in_tmux or in_ssh or in_herdr) then
+    return
+  end
+
+  local osc52 = require("vim.ui.clipboard.osc52")
+  local has_wayland = vim.env.WAYLAND_DISPLAY ~= nil
+    and vim.fn.executable("wl-copy") == 1
+    and vim.fn.executable("wl-paste") == 1
+  local has_tmux = in_tmux and vim.fn.executable("tmux") == 1
+
+  -- The last value this Neovim put on the clipboard, per register, as
+  -- { lines, regtype }. A session with no readable clipboard still has to
+  -- answer a put, and answering it with our own last copy keeps `"+y` `"+p`
+  -- working instead of failing with E353.
+  local last_copy = {}
+
+  local function copy(register)
+    local emit = osc52.copy(register)
+
+    return function(lines, regtype)
+      last_copy[register] = { lines, regtype or "" }
+
+      if has_wayland then
+        local cmd = { "wl-copy", "--sensitive", "--type", "text/plain" }
+        if register == "*" then
+          cmd[#cmd + 1] = "--primary"
+        end
+        vim.fn.system(cmd, lines)
+      end
+
+      if vim.g.omarchy_remote_clipboard_osc52 == false then
+        return
+      end
+
+      -- tmux has no notion of a primary selection, so `*` keeps using the
+      -- escape sequence directly.
+      if has_tmux and register == "+" then
+        vim.fn.system({ "tmux", "load-buffer", "-w", "-" }, lines)
+      else
+        emit(lines)
+      end
+    end
+  end
+
+  local function read_wayland(register)
+    local cmd = { "wl-paste", "--no-newline" }
+    if register == "*" then
+      cmd[#cmd + 1] = "--primary"
+    end
+
+    local lines = vim.fn.systemlist(cmd, "", 1)
+    if vim.v.shell_error == 0 then
+      return lines
+    end
+  end
+
+  -- `refresh-client -l` asks the attached client for its clipboard; the short
+  -- sleep gives the reply time to land before the buffer is read. A terminal
+  -- that refuses simply leaves tmux's newest buffer in place, so this returns
+  -- something useful either way and never blocks the way an OSC 52 query does.
+  local function read_tmux()
+    local lines = vim.fn.systemlist(
+      { "sh", "-c", "tmux refresh-client -l 2>/dev/null; sleep 0.05; tmux save-buffer -" },
+      "",
+      1
+    )
+    if vim.v.shell_error == 0 then
+      return lines
+    end
+  end
+
+  local function read_osc52(register)
+    if not (vim.g.termfeatures or {}).osc52 then
+      return
+    end
+
+    local result = osc52.paste(register)()
+    if type(result) == "table" then
+      return result
+    end
+  end
+
+  local function paste(register)
+    return function()
+      local lines
+
+      -- Over SSH the clipboard worth reading is the one on the machine the
+      -- person is sitting at, which is the far end of the connection, not the
+      -- display this Neovim happens to have.
+      if in_ssh and has_tmux then
+        lines = read_tmux()
+      elseif has_wayland then
+        lines = read_wayland(register)
+      elseif has_tmux then
+        lines = read_tmux()
+      else
+        lines = read_osc52(register)
+      end
+
+      if not empty(lines) then
+        return lines
+      end
+
+      return last_copy[register] or { vim.fn.getreg('"', 1, true), vim.fn.getregtype('"') }
+    end
+  end
+
+  vim.g.clipboard = {
+    name = "OmarchyRemoteClipboard",
+    copy = { ["+"] = copy("+"), ["*"] = copy("*") },
+    paste = { ["+"] = paste("+"), ["*"] = paste("*") },
+    cache_enabled = 0,
+  }
+
+  -- LazyVim empties this whenever SSH_CONNECTION is set. Restore it so yanking,
+  -- deleting and putting reach the clipboard exactly as they do locally.
+  vim.opt.clipboard = "unnamedplus"
+end
+
+return M

test/shell.d/neovim-remote-yanks-test.sh

@@ -0,0 +1,113 @@
+#!/bin/bash
+set -euo pipefail
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+test_home=$(mktemp -d)
+trap 'rm -rf "$test_home"' EXIT
+provider="$test_home/.config/nvim/lua/config/remote_clipboard.lua"
+mkdir -p "$(dirname "$provider")" "$test_home/bin"
+# Redirect only the packaged source path; run the actual migration logic.
+sed "s@/usr/share/omarchy-nvim/config/lua/config/remote_clipboard.lua@$test_home/package.lua@" \
+  "$ROOT/migrations/1788996284.sh" >"$test_home/migration.sh"
+printf '%s\n' '-- corrected packaged provider' >"$test_home/package.lua"
+cat >"$test_home/bin/pacman" <<'STUB'
+#!/bin/bash
+[[ $* == '-Q omarchy-nvim' ]] || exit 1
+printf 'omarchy-nvim %s\n' "${TEST_NVIM_VERSION:-2026.9.21-2}"
+STUB
+chmod +x "$test_home/bin/pacman"
+run_migration() {
+  env HOME="$test_home" PATH="$test_home/bin:$PATH" bash -euo pipefail "$test_home/migration.sh"
+}
+
+run_migration
+[[ ! -e $provider ]] || fail "missing provider is left alone"
+pass "missing provider is left alone"
+
+for fixture in "$SHELL_TEST_DIR/fixtures/neovim-clipboard/"*.lua; do
+  cp "$fixture" "$provider"
+  run_migration
+  cmp "$provider" "$test_home/package.lua" || fail "known provider is upgraded: $fixture"
+  backup=$(ls -t "$provider".bak.* | head -n1)
+  cmp "$backup" "$fixture" || fail "known provider is backed up: $fixture"
+  [[ $(stat -c %a "$provider") == "644" ]] || fail "provider is mode 0644"
+  before=$(ls "$provider".bak.*)
+  run_migration
+  [[ $(ls "$provider".bak.*) == "$before" ]] || fail "repeat migration does not create backups"
+  pass "known provider is backed up and upgraded idempotently: ${fixture##*/}"
+done
+
+cp "$SHELL_TEST_DIR/fixtures/neovim-clipboard/july.lua" "$provider"
+printf '%s\n' '-- user customization' >>"$provider"
+cp "$provider" "$test_home/custom.lua"
+run_migration >"$test_home/output"
+cmp "$provider" "$test_home/custom.lua" || fail "customized provider is preserved"
+grep -q 'Preserving customized' "$test_home/output" || fail "customized provider receives guidance"
+printf '%s\n' '-- unrelated provider' >"$provider"
+cp "$provider" "$test_home/custom.lua"
+run_migration
+cmp "$provider" "$test_home/custom.lua" || fail "unrelated provider is preserved"
+pass "customized and unrelated providers are preserved"
+
+cp "$SHELL_TEST_DIR/fixtures/neovim-clipboard/june.lua" "$provider"
+for TEST_NVIM_VERSION in 2026.8.13-1 2026.8.13-2 2026.9.21-1; do
+  export TEST_NVIM_VERSION
+  if run_migration; then fail "old package leaves migration pending: $TEST_NVIM_VERSION"; fi
+  cmp "$provider" "$SHELL_TEST_DIR/fixtures/neovim-clipboard/june.lua" || fail "old package leaves provider unchanged"
+done
+unset TEST_NVIM_VERSION
+mv "$test_home/package.lua" "$test_home/package.saved"
+if run_migration; then fail "missing package source leaves migration pending"; fi
+cmp "$provider" "$SHELL_TEST_DIR/fixtures/neovim-clipboard/june.lua" || fail "missing source leaves provider unchanged"
+pass "old or missing package cannot mark an unrepaired provider complete"
+
+mv "$test_home/package.saved" "$test_home/package.lua"
+# A write that fails after producing partial output must never damage the live
+# provider. Exercise the real install destination with a failing replacement.
+cat >"$test_home/bin/install" <<'STUB'
+#!/bin/bash
+printf '%s' '-- truncated replacement' >"${@: -1}"
+exit 1
+STUB
+chmod +x "$test_home/bin/install"
+if run_migration; then fail "failed staging write leaves migration pending"; fi
+cmp "$provider" "$SHELL_TEST_DIR/fixtures/neovim-clipboard/june.lua" || fail "failed write preserves live provider"
+if compgen -G "$provider.new.*" >/dev/null; then fail "failed staging file is cleaned up"; fi
+rm "$test_home/bin/install"
+run_migration
+cmp "$provider" "$test_home/package.lua" || fail "retry repairs the recognized original"
+pass "failed write preserves original and retry succeeds"
+
+# Also fail the final rename, after successful staging.
+cp "$SHELL_TEST_DIR/fixtures/neovim-clipboard/july.lua" "$provider"
+printf '#!/bin/bash\nexit 1\n' >"$test_home/bin/mv"
+chmod +x "$test_home/bin/mv"
+if run_migration; then fail "failed rename leaves migration pending"; fi
+cmp "$provider" "$SHELL_TEST_DIR/fixtures/neovim-clipboard/july.lua" || fail "failed rename preserves original"
+if compgen -G "$provider.new.*" >/dev/null; then fail "failed rename staging file is cleaned up"; fi
+rm "$test_home/bin/mv"
+run_migration
+cmp "$provider" "$test_home/package.lua" || fail "retry after rename failure succeeds"
+pass "failed rename preserves original and retry succeeds"
+
+cp "$SHELL_TEST_DIR/fixtures/neovim-clipboard/july.lua" "$test_home/dotfile.lua"
+rm "$provider"
+ln -s "$test_home/dotfile.lua" "$provider"
+run_migration >"$test_home/output"
+[[ -L $provider ]] || fail "provider symlink is preserved"
+cmp "$test_home/dotfile.lua" "$SHELL_TEST_DIR/fixtures/neovim-clipboard/july.lua" || fail "symlink target is preserved"
+grep -q 'symlink-managed' "$test_home/output" || fail "linked provider receives guidance"
+rm "$provider"
+ln -s "$test_home/absent.lua" "$provider"
+run_migration
+[[ -L $provider && ! -e $provider ]] || fail "dangling symlink is preserved"
+rm "$provider"
+
+mkdir "$test_home/dotfiles"
+mv "$test_home/.config/nvim/lua/config" "$test_home/dotfiles/config"
+ln -s "$test_home/dotfiles/config" "$test_home/.config/nvim/lua/config"
+cp "$SHELL_TEST_DIR/fixtures/neovim-clipboard/july.lua" "$provider"
+run_migration
+[[ -L $test_home/.config/nvim/lua/config ]] || fail "linked config directory is preserved"
+cmp "$provider" "$SHELL_TEST_DIR/fixtures/neovim-clipboard/july.lua" || fail "provider in linked directory is preserved"
+pass "linked files, dangling links and linked directories are preserved"