feat(context): add absolute_paths config option

README.md

@@ -91,6 +91,18 @@ programs.nixvim = {
 | `@marks`         | Global marks                                                |
 | `@grapple`       | [grapple.nvim](https://github.com/cbochs/grapple.nvim) tags |
 
+#### Absolute Paths
+
+By default, file paths in contexts are relative to Neovim's working directory. If `opencode` is running in a different directory, these relative paths may not resolve correctly.
+
+Set `absolute_paths = true` to use absolute file paths instead:
+
+```lua
+vim.g.opencode_opts = {
+  absolute_paths = true,
+}
+```
+
 ### Prompts
 
 Select or reference prompts to review, explain, and improve your code:

lua/opencode/config.lua

@@ -18,6 +18,10 @@ vim.g.opencode_opts = vim.g.opencode_opts
 ---If set, `opencode.nvim` will append `--port <port>` to `provider.cmd` if not already present.
 ---@field port? number
 ---
+---Use absolute file paths instead of paths relative to Neovim's CWD.
+---Useful when `opencode` is running in a different directory than Neovim.
+---@field absolute_paths? boolean
+---
 ---Contexts to inject into prompts, keyed by their placeholder.
 ---@field contexts? table<string, fun(context: opencode.Context): string|nil>
 ---
@@ -45,6 +49,7 @@ vim.g.opencode_opts = vim.g.opencode_opts
 ---@type opencode.Opts
 local defaults = {
   port = nil,
+  absolute_paths = false,
   -- stylua: ignore
   contexts = {
     ["@this"] = function(context) return context:this() end,

lua/opencode/context.lua

@@ -236,9 +236,12 @@ end
 function Context.format(args)
   local result = ""
   if (args.buf and is_buf_valid(args.buf)) or args.path then
-    local rel_path = vim.fn.fnamemodify(args.path or vim.api.nvim_buf_get_name(args.buf), ":.")
+    local raw_path = args.path or vim.api.nvim_buf_get_name(args.buf)
+    local use_absolute = require("opencode.config").opts.absolute_paths
+    -- `:p` expands to full path, `:." makes relative to CWD
+    local path = vim.fn.fnamemodify(raw_path, use_absolute and ":p" or ":.")
     -- Must be preceeded by @ and followed by space for `opencode` to parse as a file reference
-    result = "@" .. rel_path .. " "
+    result = "@" .. path .. " "
   end
   if args.start_line and args.end_line and args.start_line > args.end_line then
     args.start_line, args.end_line = args.end_line, args.start_line