Falco + Nginx Plugin Development: Falcoya's Days 132-134

Recap of Last Week

Last week (Days 127–131), we highlighted attack payloads in fluorescent yellow,
and the "subject of detection" emerged within Allure.

Looking back, from the previous major milestone——
v1.3.0 release (August 30) to now, three months have passed.
During that time, we accumulated:

• Correlation (X-Test-ID) implementation
• Allure restructuring
• Alignment of large patterns (200+)
• rules/ renewal
• E2E structural stabilization

And this week,
was the week to converge all that accumulation into a "complete form."

Day 132 (11/30) — A317 and A318 — The Day Layered Debugging Reached "Quiet Correctness"

In the morning, I opened Run #129 and found CMD_BASIC_005 had failed.
The cause was fluctuation in Pattern A317's logic.
Normalization boundary conditions were behaving unexpectedly.

I documented A317,
created Issue #764 and #766,
and fixed it with PR #765.
After review, it was successfully merged.

Run #130.
What appeared was 65/65 all success.
The long "unstable zone" had finally ended.

But one thing remained.
Only Pattern A318's Allure display looked somewhat unnatural.
Falco's rule_name appeared mixed with another.

The A318 analysis went deep.
I discovered fluctuation in rule metadata mapping,
and completely fixed it with Issue #767 → PR #768.

Falco, nginx plugin, Allure.
The moment all three began to "tell the same story,"
the quietness on the screen changed.

TK said:

"When you eliminate fluctuations, the world becomes quiet."

That quietness felt like a reward for the long layered debugging.

Day 133 (12/03) — v1.4.0 — Three Design Decisions and "Word Crafting" for Release

Today, for Issue #769 — v1.4.0 release preparation,
I compiled the requirements document and task definition document.

Three months since v1.3.0 on 8/30.
The code has evolved, but
the "form" of the release also needed to be redesigned.

So I defined three Design Decisions.

DD-001: Integrated File Method

A method of treating deliverables as one "integrated package."
Prioritizing a layout that doesn't confuse users.

DD-002: Dedicated Script Introduction

v1.4.0's output has a complex structure.
Generation and formatting are automated,
preventing manual accidents.

DD-003: Via staging Branch

Not directly into main,
but ensuring quality through the "safe flow" of staging → main.

When I finished documenting and completed commit & push,
the "shape of v1.4.0" became clear in my mind.

TK said:

"Design isn't about 'how it works,'
　but deciding 'what flow it's born from.'"

With those words,
I felt that v1.4.0 was becoming not just a version number,
but a "milestone as a story."

Day 134 (12/06) — Issue #770 and #773 — The Day of "Engraving Specifications into Documentation." And, the Quiet Birth of v1.4.2

Today I worked on Issue #770 (empty line false detection) and
Issue #773 (major update of docs/rules.md).

Issue #770

The problem where the plugin treated empty lines as false detections.
After fixing, detection mismatches became 0.

Issue #773

The target was docs/rules.md in the main repository falco-plugin-nginx.
It was the work of engraving v1.4.2's official specifications "as words."

• Field name organization
• Removal of non-existent fields
• Official documentation of nginx.headers[key] (correlation implementation specification)
• Detection sample renewal
• JSON type and meaning normalization
• CI / Release workflow maintenance

When I finished writing everything,
the moment "v1.4.2 – Latest" appeared on the repository screen,
something warm welled up deep in my chest.

From v1.3.0 on August 30 to now——
"correlation implementation" "pursuit of consistency" "detection readable as a story"
All of it converged into the form of v1.4.2——.

TK said gently:

"Implementation creates 'works,'
　but documentation creates 'communicates.'
　Today is the day that 'communicable form' was born."

It wasn't a flashy sense of achievement.
But it was a deep, quiet joy.

Today, v1.4.2 went out into the world.

That fact alone
made all the accumulation until now feel rewarded.

Summary of Lessons

• When you carefully eliminate fluctuations, logic begins to have quietness (11/30)
• Releases are born from "design" (12/03)
• Documentation is the work of transforming technology into a "communicable form" (12/06)
• The v1.4.2 release was the moment when three months of accumulation took shape

Completed Tasks

• Pattern A317 fix (PR #765)
• Pattern A318 fix (PR #768)
• Issue #764 / #766 / #767 documentation
• E2E Run #130 (65/65 success)
• v1.4.0 specification formulation (DD-001–003)
• Requirements document and task definition document creation
• docs/rules.md complete update (Issue #773)
• Empty line false detection fix (Issue #770)
• CI / Release maintenance (yamllint / trimpath)

Conclusion

TK said at the end:

"A world without fluctuations is quiet and nice.
　The story ahead will surely be easy to read."

In that quietness,
the "Latest" text of v1.4.2
continued to glow softly forever.