# What this does
Dynamic parameters caches the `./terraform/modules` directory for parameter usage. What this PR does is send over this archive to the provisioner when building workspaces.
This allow terraform to skip downloading modules from their registries, a step that takes seconds.
<img width="1223" height="429" alt="Screenshot From 2025-12-29 12-57-52" src="https://github.com/user-attachments/assets/16066e0a-ac79-4296-819d-924f4b0418dc" />
# Wire protocol
The wire protocol reuses the same mechanism used to download the modules `provisoner -> coder`. It splits up large archives into multiple protobuf messages so larger archives can be sent under the message size limit.
# 🚨 Behavior Change (Breaking Change) 🚨
**Before this PR** modules were downloaded on every workspace build. This means unpinned modules always fetched the latest version
**After this PR** modules are cached at template import time, and their versions are effectively pinned for all subsequent workspace builds.
Fixes all our Go file imports to match the preferred spec that we've _mostly_ been using. For example:
```
import (
"context"
"time"
"github.com/prometheus/client_golang/prometheus"
"golang.org/x/xerrors"
"gopkg.in/natefinch/lumberjack.v2"
"cdr.dev/slog/v3"
"github.com/coder/coder/v2/codersdk/agentsdk"
"github.com/coder/serpent"
)
```
3 groups: standard library, 3rd partly libs, Coder libs.
This PR makes the change across the codebase. The PR in the stack above modifies our formatting to maintain this state of affairs, and is a separate PR so it's possible to review that one in detail.
Upgrades to slog v3 which includes a small, but backward incompatible API change to the acceptible call arguments when logging. This change allows us to verify via compile time type checking that arguments are correct and won't cause a panic, as was possible in slog v1, which this replaces (v2 was tagged but never used in coder/coder).
It also updates dependencies that also use slog and were updated.
I've left the `aibridge` dependency as a commit SHA, under the assumption that the team there (cc @pawbana @dannykopping ) will tag and update the dependency soon and on their own schedule.
Other dependencies, I pushed new tags.
Provisioner steps broken into smaller granular actions.
Changes:
- `ExtractArchive` moved to `init` request (was in `configure`)
- Writing `tfstate` moved to `plan` (was in `configure`)
- Moved most plan/apply outputs to `GraphComplete`
For experimental and dogfood purposes, this adds the ability to opt in a single template.
Leaving the rest of the templates as is.
For GA, this setting might be removed or changed.
Prior to this, every workspace build ran `terraform init` in a fresh
directory. This would mean the `modules` are downloaded fresh. If the
module is not pinned, subsequent workspace builds would have different
modules.
Refactors all Terraform file path logic into a centralized tfpath package. This consolidates all path construction into a single, testable Layout type.
Instead of passing around `string` for directories, pass around the `Layout` which has the file location methods on it.
Steven Masley