feat: v0.9.0 - Container/Image Gaps, Context, and Auth

14 new MCP tools (98 total), 1 new skill (15 total):

Container gaps: diff, export, port, rename

Image gaps: imageHistory, import

Context management: contextCreate, contextLs, contextInspect, contextRm, contextUse, contextShow

Registry auth: login (password-stdin), logout

New skill: docker-context-management

528 tests passing (314 vitest + 214 pytest)

Made-with: Cursor

Author: TMHSDigital

.cursor-plugin/plugin.json

@@ -1,8 +1,8 @@
 {
   "name": "docker-developer-tools",
   "displayName": "Docker Developer Tools",
-  "version": "0.8.0",
-  "description": "A Cursor plugin for Docker and container workflows - 14 skills, 9 rules, and 84 MCP tools for building, debugging, optimizing, and managing Docker containers, images, networks, and volumes. Includes a companion MCP server (docker-mcp) for live Docker CLI integration.",
+  "version": "0.9.0",
+  "description": "A Cursor plugin for Docker and container workflows - 15 skills, 9 rules, and 98 MCP tools for building, debugging, optimizing, and managing Docker containers, images, networks, and volumes. Includes a companion MCP server (docker-mcp) for live Docker CLI integration.",
   "author": {
     "name": "TMHSDigital",
     "url": "https://github.com/TMHSDigital"

CHANGELOG.md

@@ -5,6 +5,31 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.9.0] - 2026-03-29
+
+### Added
+
+#### MCP Server - Container/Image Gaps, Context, and Auth (+14, total 98)
+- `docker_diff` - inspect filesystem changes in a container (added, changed, deleted files)
+- `docker_export` - export a container's filesystem as a tar archive (with 300s timeout for large filesystems)
+- `docker_port` - list port mappings or a specific mapping for a container (tcp/udp protocol)
+- `docker_rename` - rename a Docker container
+- `docker_imageHistory` - show layer history of an image with commands, sizes, and timestamps (JSON format, no-trunc option)
+- `docker_import` - import a tarball to create a filesystem image (with Dockerfile change instructions, 300s timeout)
+- `docker_contextCreate` - create a Docker context for connecting to remote hosts (SSH, TCP endpoints)
+- `docker_contextLs` - list available Docker contexts (JSON format)
+- `docker_contextInspect` - display detailed information on a Docker context
+- `docker_contextRm` - remove one or more Docker contexts (with force option)
+- `docker_contextUse` - set the current active Docker context
+- `docker_contextShow` - print the name of the current Docker context
+- `docker_login` - authenticate to a container registry (password piped via stdin for security)
+- `docker_logout` - log out from a container registry
+
+#### Plugin
+- `docker-context-management` skill - managing remote Docker hosts, SSH contexts, TLS contexts, multi-host workflows, context switching patterns
+
+---
+
 ## [0.8.0] - 2026-03-29
 
 ### Added
@@ -234,6 +259,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Python test suite: plugin manifest, skills, rules, docs consistency, internal links, roadmap
 - Vitest test suite: error classes, docker-api utilities, input validation
 
+[0.9.0]: https://github.com/TMHSDigital/Docker-Developer-Tools/releases/tag/v0.9.0
 [0.8.0]: https://github.com/TMHSDigital/Docker-Developer-Tools/releases/tag/v0.8.0
 [0.7.0]: https://github.com/TMHSDigital/Docker-Developer-Tools/releases/tag/v0.7.0
 [0.6.0]: https://github.com/TMHSDigital/Docker-Developer-Tools/releases/tag/v0.6.0

CLAUDE.md

@@ -4,11 +4,11 @@ Project documentation for Claude Code and AI assistants working on this reposito
 
 ## Project Overview
 
-Docker Developer Tools is a Cursor IDE plugin that integrates Docker and container workflows into Cursor's AI chat. It includes 14 skills, 9 rules, and a companion MCP server with 84 tools for live Docker CLI integration.
+Docker Developer Tools is a Cursor IDE plugin that integrates Docker and container workflows into Cursor's AI chat. It includes 15 skills, 9 rules, and a companion MCP server with 98 tools for live Docker CLI integration.
 
 This is a monorepo - the Cursor plugin (skills and rules) and the companion MCP server live in the same repository. Docker's API is local (Docker Engine socket / CLI), so one repo is simpler for users to install and maintain.
 
-**Version:** 0.8.0
+**Version:** 0.9.0
 **License:** CC-BY-NC-ND-4.0
 **Author:** TMHSDigital
 
@@ -35,7 +35,7 @@ Docker-Developer-Tools/
   tests/                     # Python structure tests
 ```
 
-## Skills (14)
+## Skills (15)
 
 | Skill | Description |
 |-------|-------------|
@@ -53,6 +53,7 @@ Docker-Developer-Tools/
 | `docker-resource-management` | Resource limits and monitoring |
 | `docker-advanced-workflows` | Multi-stage pipelines, sidecar patterns, healthchecks, signal handling |
 | `docker-multi-platform` | Multi-arch builds, buildx configuration, manifest lists, platform targeting |
+| `docker-context-management` | Remote Docker hosts, SSH/TLS contexts, multi-host workflows |
 
 ## Rules (9)
 
@@ -68,7 +69,7 @@ Docker-Developer-Tools/
 | `buildx-best-practices` | Dockerfiles, compose files | Flag multi-platform build issues, missing cache config |
 | `compose-scaling` | Compose files | Flag scaling blockers: container_name, fixed host ports, missing limits |
 
-## MCP Server (84 tools)
+## MCP Server (98 tools)
 
 The MCP server talks to Docker via CLI exec (`docker` commands) rather than the Docker Engine REST API. It uses stdio transport and requires `docker` to be available on PATH.
 
@@ -206,6 +207,40 @@ The MCP server talks to Docker via CLI exec (`docker` commands) rather than the
 | `docker_manifestPush` | Push a manifest list to a registry |
 | `docker_manifestRm` | Remove local manifest lists |
 
+### Container Gaps (4)
+
+| Tool | Description |
+|------|-------------|
+| `docker_diff` | Inspect filesystem changes in a container |
+| `docker_export` | Export a container's filesystem as a tar archive |
+| `docker_port` | List port mappings for a container |
+| `docker_rename` | Rename a container |
+
+### Image Gaps (2)
+
+| Tool | Description |
+|------|-------------|
+| `docker_imageHistory` | Show layer history of an image |
+| `docker_import` | Import a tarball to create a filesystem image |
+
+### Context Management (6)
+
+| Tool | Description |
+|------|-------------|
+| `docker_contextCreate` | Create a context for remote Docker hosts |
+| `docker_contextLs` | List available contexts |
+| `docker_contextInspect` | Display detailed context information |
+| `docker_contextRm` | Remove one or more contexts |
+| `docker_contextUse` | Set the current active context |
+| `docker_contextShow` | Print the name of the current context |
+
+### Registry Authentication (2)
+
+| Tool | Description |
+|------|-------------|
+| `docker_login` | Authenticate to a container registry |
+| `docker_logout` | Log out from a container registry |
+
 ## Development Workflow
 
 ### Plugin development (symlink)
@@ -359,3 +394,17 @@ Full checklist with copy-paste commands: [CONTRIBUTING.md - Release Checklist](C
 | `docker manifest annotate` | `docker_manifestAnnotate` |
 | `docker manifest push` | `docker_manifestPush` |
 | `docker manifest rm` | `docker_manifestRm` |
+| `docker diff` | `docker_diff` |
+| `docker export -o` | `docker_export` |
+| `docker port` | `docker_port` |
+| `docker rename` | `docker_rename` |
+| `docker history --format json` | `docker_imageHistory` |
+| `docker import` | `docker_import` |
+| `docker context create` | `docker_contextCreate` |
+| `docker context ls --format json` | `docker_contextLs` |
+| `docker context inspect` | `docker_contextInspect` |
+| `docker context rm` | `docker_contextRm` |
+| `docker context use` | `docker_contextUse` |
+| `docker context show` | `docker_contextShow` |
+| `docker login --password-stdin` | `docker_login` |
+| `docker logout` | `docker_logout` |

README.md

@@ -11,7 +11,7 @@
 <p align="center">
   <a href="https://github.com/TMHSDigital/Docker-Developer-Tools/actions/workflows/validate.yml"><img src="https://img.shields.io/github/actions/workflow/status/TMHSDigital/Docker-Developer-Tools/validate.yml?branch=main&label=CI" alt="CI" /></a>
   <a href="LICENSE"><img src="https://img.shields.io/badge/license-CC--BY--NC--ND--4.0-blue" alt="License" /></a>
-  <img src="https://img.shields.io/badge/version-0.8.0-green" alt="Version" />
+  <img src="https://img.shields.io/badge/version-0.9.0-green" alt="Version" />
   <a href="https://www.npmjs.com/package/@tmhs/docker-mcp"><img src="https://img.shields.io/npm/v/@tmhs/docker-mcp" alt="npm" /></a>
   <a href="https://www.npmjs.com/package/@tmhs/docker-mcp"><img src="https://img.shields.io/npm/dm/@tmhs/docker-mcp" alt="npm downloads" /></a>
   <a href="https://www.npmjs.com/package/@tmhs/docker-mcp"><img src="https://img.shields.io/npm/unpacked-size/@tmhs/docker-mcp" alt="npm size" /></a>
@@ -22,7 +22,7 @@
 </p>
 
 <p align="center">
-  <strong>14 skills</strong>&nbsp;&bull;&nbsp;<strong>9 rules</strong>&nbsp;&bull;&nbsp;<strong>84 MCP tools</strong>
+  <strong>15 skills</strong>&nbsp;&bull;&nbsp;<strong>9 rules</strong>&nbsp;&bull;&nbsp;<strong>98 MCP tools</strong>
 </p>
 
 ---
@@ -50,7 +50,7 @@ flowchart LR
 ---
 
 <details>
-<summary><strong>14 Skills</strong> - on-demand Docker expertise</summary>
+<summary><strong>15 Skills</strong> - on-demand Docker expertise</summary>
 
 &nbsp;
 
@@ -70,6 +70,7 @@ flowchart LR
 | **Debugging** | `container-debugging` | Exec into containers, log analysis, health checks, process inspection |
 | **Advanced** | `docker-advanced-workflows` | Multi-stage pipelines, sidecar patterns, healthchecks, signal handling |
 | **Advanced** | `docker-multi-platform` | Multi-arch builds, buildx configuration, manifest lists, platform targeting |
+| **Advanced** | `docker-context-management` | Remote Docker hosts, SSH/TLS contexts, multi-host workflows |
 
 </details>
 
@@ -118,7 +119,7 @@ Add to your Cursor MCP config (`.cursor/mcp.json`):
 ```
 
 <details>
-<summary><strong>84 MCP Tools</strong> - full tool reference</summary>
+<summary><strong>98 MCP Tools</strong> - full tool reference</summary>
 
 &nbsp;
 
@@ -256,6 +257,40 @@ Add to your Cursor MCP config (`.cursor/mcp.json`):
 | `docker_manifestPush` | Push a manifest list to a registry |
 | `docker_manifestRm` | Remove local manifest lists |
 
+**Container Gaps** (4)
+
+| Tool | What It Does |
+|---|---|
+| `docker_diff` | Inspect filesystem changes in a container (added, changed, deleted files) |
+| `docker_export` | Export a container's filesystem as a tar archive |
+| `docker_port` | List port mappings or a specific mapping for a container |
+| `docker_rename` | Rename a Docker container |
+
+**Image Gaps** (2)
+
+| Tool | What It Does |
+|---|---|
+| `docker_imageHistory` | Show layer history of an image (commands, sizes, timestamps) |
+| `docker_import` | Import a tarball to create a Docker filesystem image |
+
+**Context Management** (6)
+
+| Tool | What It Does |
+|---|---|
+| `docker_contextCreate` | Create a Docker context for connecting to remote hosts |
+| `docker_contextLs` | List available Docker contexts |
+| `docker_contextInspect` | Display detailed information on a Docker context |
+| `docker_contextRm` | Remove one or more Docker contexts |
+| `docker_contextUse` | Set the current active Docker context |
+| `docker_contextShow` | Print the name of the current Docker context |
+
+**Registry Authentication** (2)
+
+| Tool | What It Does |
+|---|---|
+| `docker_login` | Authenticate to a Docker container registry |
+| `docker_logout` | Log out from a Docker container registry |
+
 </details>
 
 ---
@@ -314,6 +349,7 @@ Then add the JSON config from the [MCP Server section](#companion-docker-mcp-ser
 | `container-debugging` | "Show me the logs and processes inside my crashing container" |
 | `docker-advanced-workflows` | "Set up healthchecks and graceful shutdown for my Node.js container" |
 | `docker-multi-platform` | "Build my Go API image for both amd64 and arm64 with buildx" |
+| `docker-context-management` | "Set up a Docker context for my remote staging server via SSH" |
 
 </details>
 

ROADMAP.md

@@ -4,7 +4,7 @@
 
 ## Current Status
 
-**v0.8.0** - Compose Completeness release with 14 skills, 9 rules, and 84 MCP tools.
+**v0.9.0** - Container/Image Gaps, Context, and Auth release with 15 skills, 9 rules, and 98 MCP tools.
 
 ## Release Plan
 
@@ -17,8 +17,8 @@
 | v0.5.0 | Volumes, Networks, Cleanup | +13 | 49 | +0 | +0 | Released |
 | v0.6.0 | Advanced and Observability | +6 | 55 | +1 | +1 | Released |
 | v0.7.0 | Buildx, Manifests, and Registry | +13 | 68 | +1 | +1 | Released |
-| v0.8.0 | Compose Completeness | +16 | 84 | +0 | +1 | (current) |
-| v0.9.0 | Container/Image Gaps, Context, Auth | +14 | 98 | +1 | +0 | Planned |
+| v0.8.0 | Compose Completeness | +16 | 84 | +0 | +1 | Released |
+| v0.9.0 | Container/Image Gaps, Context, Auth | +14 | 98 | +1 | +0 | (current) |
 | v0.10.0 | Swarm Orchestration | +24 | 122 | +1 | +1 | Planned |
 | v0.11.0 | Swarm Stacks, Configs, Secrets, Trust | +18 | 140 | +1 | +0 | Planned |
 | v0.12.0 | Niche, Scout, and Extras | +10 | 150 | +0 | +0 | Planned |
@@ -404,6 +404,8 @@ All destructive MCP tools (`rm`, `rmi`, `prune`, `kill`, `down`, `leave`) will:
 - [x] 13 buildx and manifest tools (buildxBuild/Ls/Create/Rm/Inspect/Use/Imagetools, builderPrune, manifestCreate/Inspect/Annotate/Push/Rm)
 - [x] 14 skills covering Docker workflows including multi-platform builds
 - [x] 16 compose completeness tools (composeConfig/Cp/Create/Events/Images/Kill/Ls/Pause/Unpause/Port/Rm/Run/Scale/Start/Stop/Top)
+- [x] 14 container/image gap, context, and auth tools (diff/export/port/rename/imageHistory/import/contextCreate/Ls/Inspect/Rm/Use/Show/login/logout)
+- [x] 15 skills covering Docker workflows including context management
 - [x] 9 rules including buildx best practices and compose scaling
 - [x] 8 image and build tools (pull, push, build, tag, rmi, commit, save, load)
 - [x] 8 compose tools (composeUp, composeDown, composePs, composeLogs, composeBuild, composeRestart, composePull, composeExec)