An agreement has been reached by representatives of nearly 200 countries on how to implement the Paris Climate Accord, after two weeks of negotiations at the UN Climate Change conference in Poland.
The deal covers how countries report and measure their carbon dioxide emissions.
Other issues where agreement could not be found will be revisited at a later date.
Delegates from nearly 200 states finalised a common rule book designed to deliver the Paris goals of limiting global temperature rises to well below two degrees Celsius.
"Putting together the Paris agreement work programme is a big responsibility," said COP24 president Michal Kurtyka.
"It has been a long road. We did our best to leave no one behind."
But states already dealing with devastating floods, droughts and extreme weather made worse by climate change said the package agreed in Katowice lacked the bold ambition to cut emissions the world needed.
Egyptian ambassador Wael Aboulmagd, chair of the developing nations G77 plus China negotiating bloc, said the rule book saw the "urgent adaptation needs of developing countries relegated to a second-class status."
The final decision text was repeatedly delayed as negotiators sought guidelines that could ward off the worst threats posed by the heating of the planet while protecting the economies of rich and poor nations alike.
"Without a clear rulebook, we won't see how countries are tracking, whether they are actually doing what they say they are doing," Canada's Environment Minister Catherine McKenna said.
At their heart, negotiations were about how each nation funds action to mitigate and adapt to climate change, as well as how those actions are reported.
French President Emmanuel Macron, who has recently backed down on anti-pollution fuel tax hikes in the face of country-wide "yellow vest" protests, said France must "show the way" as he welcomed the progress made at the talks.
"The international community remains committed to the fight against climate change," he said.
Developing nations had wanted more clarity from richer ones over how the future climate fight will be funded and pushed for so-called "loss and damage" measures.
This would see richer countries giving money now to help deal with the effects of climate change many vulnerable states are already experiencing.
Another contentious issue was the integrity of carbon markets, looking ahead to the day when the patchwork of distinct exchanges - in China, the Europe Union, and parts of the United States - may be joined up in a global system.
The Paris Agreement calls for the setting up of a mechanism to guard against practices, such as double counting emissions savings, that could undermine such a market.
A major sticking point, delegates eventually agreed to kick the issue down the road until next year.
One of the largest disappointments for countries was the lack of ambition to reduce emissions shown in the final COP24 text.
Most nations wanted the findings of the Intergovernmental Panel on Climate Change (IPCC) to form a key part of future planning.
It highlighted the need to slash carbon pollution by nearly half before 2030 in order to hit the 1.5C target.
But the US, Saudi Arabia, Russia and Kuwait objected, leading to watered-down wording.
The final statement from the Polish COP24 presidency welcomed "the timely conclusion" of the report and invited "parties to make use of it".
UN Secretary-General Antonio Guterres, who made three trips to Katowice over the course of the talks, said the world's climate fight was just beginning.
"From now on my five priorities will be: Ambition, ambition, ambition, ambition, ambition," he said in a message read out by UN climate chief Patricia Espinosa.