Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add rules/secondlifes/delphi-expert/threading-patternsgit clone --depth 1 https://github.com/SecondLifes/delphi-expertWrote 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/rules/secondlifes/delphi-expert/threading-patterns)<a href="https://agentmods.dev/rules/secondlifes/delphi-expert/threading-patterns"><img src="https://agentmods.dev/badge/rules/secondlifes/delphi-expert/threading-patterns.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.00732 |
| Opus 5 | $0.00000 | $0.00366 |
| Sonnet 5 | $0.00000 | $0.00146 |
| Haiku 4.5 | $0.00000 | $0.00073 |
Grade A, and why
threading-patterns 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Threading & Multi-Threading — Rules
Use these rules when working with threads and asynchronous tasks in Delphi.
Golden Rule
NEVER access visual components (VCL/FMX) from a secondary thread. Use
TThread.Synchronize(blocking) orTThread.Queue(non-blocking).
Approaches
| Approach | When to Use |
|---|---|
TThread.CreateAnonymousThread |
Simple, one-shot tasks |
TTask.Run (PPL) |
Modern way, managed pool |
TParallel.For |
Parallel loop in collections |
TFuture<T> |
Asynchronous result with value |
TThread (inheritance) |
Permanent workers, queues, servers |
Update UI from Thread
{ Queue: não-bloqueante (PREFERIR) }
TThread.Queue(nil,
procedure
begin
lblStatus.Caption := 'Processando...';
end);
{ Synchronize: bloqueante (quando precisa do resultado) }
TThread.Synchronize(nil,
procedure
begin
lblStatus.Caption := 'Processando...';
end);
TTask.Run — Modern Way
uses System.Threading;
TTask.Run(
procedure
begin
{ Código pesado em background }
PerformWork;
TThread.Queue(nil,
procedure
begin
lblResult.Caption := 'Concluído';
end);
end);
Thread-Safety
| Mechanism | When to Use |
|---|---|
TCriticalSection |
Classic critical section (Enter/Leave) |
TMonitor |
Object native lock (Enter/Exit) |
TInterlocked |
Atomic operations on Integer/Int64 |
TThreadList<T> |
Thread-safe list with LockList/UnlockList |
TMultiReadExclusiveWriteSynchronizer |
Cache: many reads, few writes |
TThreadedQueue<T> |
Thread-safe queue (Producer-Consumer) |
{ TCriticalSection — SEMPRE Leave no finally }
FLock.Enter;
try
Inc(FSharedCounter);
finally
FLock.Leave;
end;
{ TInterlocked — Operações atômicas simples }
TInterlocked.Increment(FProcessed);
Cancelamento
{ Via Terminated em TThread }
while not Terminated do
begin
DoWork;
end;
{ Via token customizado em TTask }
if AToken.IsCancelled then
Exit;
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.
- today First seen · 117 lines · 0 tokens per session scan A fa311cc64830
threading-patterns is a cursor rule published in the GitHub repository SecondLifes/delphi-expert (3 stars, last pushed 2d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 732 tokens. 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.
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