Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/alfredoperez/speckit-companionnpx agentmods add commands/alfredoperez/speckit-companion/speckit.companion.after-planWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/alfredoperez/speckit-companion/speckit.companion.after-plan)<a href="https://agentmods.dev/commands/alfredoperez/speckit-companion/speckit.companion.after-plan"><img src="https://agentmods.dev/badge/commands/alfredoperez/speckit-companion/speckit.companion.after-plan/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/commands/alfredoperez/speckit-companion/speckit.companion.after-plan"><img src="https://agentmods.dev/badge/commands/alfredoperez/speckit-companion/speckit.companion.after-plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00022 | $0.00532 |
| Opus 5 | $0.00011 | $0.00266 |
| Sonnet 5 | $0.00004 | $0.00106 |
| Haiku 4.5 | $0.00002 | $0.00053 |
Grade A, and why
speckit.companion.after-plan scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- speckit.companion.after-tasks — 86% identical, 20 lines differ
How it starts
The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Capture Plan Context
Record the active feature's plan completion into .spec-context.json so the
SpecKit Companion GUI re-renders with the correct step and status. This command
runs as the after_plan lifecycle hook — state-writing only; the plan
document is created by the core speckit.plan workflow.
Prerequisites
- Verify Python is available by running
python3 --version. - If
python3is not available, warn the user and skip the capture:[companion] Warning: python3 not detected; skipped .spec-context.json capture. Do not fail the host command.
Execution
Run the writer script from the repository root:
python3 .specify/extensions/companion/scripts/write-context.py --step plan --status planned --kind complete --by extension
--kind complete records the plan step's completion boundary (the plan body already recorded the step's start when it began), so the extension stamps both ends of the span in order. The completion append is idempotent — a re-fired hook never doubles it.
The script resolves the active feature directory on its own, in this order:
--feature-dir → SPECIFY_FEATURE_DIRECTORY env → SPECIFY_FEATURE env →
.specify/feature.json → current git branch prefix.
If you already know the feature directory (e.g. the one speckit.plan just
wrote into), pass it explicitly so resolution is unambiguous:
python3 .specify/extensions/companion/scripts/write-context.py --feature-dir specs/<NNN>-<slug> --step plan --status planned --kind complete --by extension
Graceful Degradation
The script is best-effort and never fails the host command:
- If
python3is missing, skip with the warning above. - If the active feature directory cannot be resolved, the script prints a warning to stderr and exits 0 without writing.
Output
On success the script prints the path it updated and the values written, e.g.:
[companion] Updated specs/<NNN>-<slug>/.spec-context.json (currentStep=plan, status=planned, kind=complete, by=extension).
The write is atomic (temp file + rename) and appends to the canonical history[] without
rewriting existing entries.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago Changed c2d4041700d0
- 9d ago First seen · 53 lines · 22 tokens per session scan A 88f9f78e4c85
speckit.companion.after-plan is a command published in the GitHub repository alfredoperez/speckit-companion (90 stars, last pushed today), licensed MIT. It adds 22 tokens to every session and 532 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other commands, from other repositories
camp-init
Create a new camp with the standard directory structure. A camp was previously called a campaign; camp init is the same command either way.
fest-list
List all festivals with their status and completion percentage.
fest-next
Get the next actionable festival task with full context.
sddp-implement-qc-loop
Command description: Run implement and QC in a continuous loop. Argument hint: [optional: feature directory or branch name] Command category: orchestration Prerequisites: spec, plan, tasks.
sddp-amend
Command description: Propagate a bootstrap change across canonical project artifacts and the project plan. Argument hint: [project-level change to propagate across bootstrap artifacts] Command category: project-bootstrap Prerequisites: project-instructions, product-document, technical-context, project-plan.
sddp-clarify
Command description: Reduce ambiguity in the current feature specification. Argument hint: [optional: ambiguity focus or feature directory] Command category: feature-delivery Prerequisites: spec.